{"id":124,"date":"2025-03-28T10:59:40","date_gmt":"2025-03-28T10:59:40","guid":{"rendered":"https:\/\/www.own-smile.com\/?p=124"},"modified":"2026-06-25T11:41:56","modified_gmt":"2026-06-25T03:41:56","slug":"lithium-disilicate-vs-zirconia-block","status":"publish","type":"post","link":"https:\/\/www.own-smile.com\/es\/product-intro\/lithium-disilicate-vs-zirconia-block\/","title":{"rendered":"Lithium Disilicate vs Zirconia: A Clinician&#8217;s Guide to Material Selection"},"content":{"rendered":"\n<!-- ============================================================\n  BLOCK 1: TABLE OF CONTENTS + BYLINE + DISCLOSURE\n  Paste everything between the START and END markers into\n  a WordPress \"Custom HTML\" block.\n============================================================ -->\n<!-- BLOCK 1 START -->\n<style>\n.os_blog_header {\n  font-family: \"Roboto\", sans-serif;\n  max-width: 900px;\n  margin: 0 auto;\n  padding: 20px 20px 0;\n  color: #3f3f3f;\n}\n.os_blog_byline {\n  display: flex;\n  align-items: center;\n  gap: 15px;\n  margin-bottom: 20px;\n  flex-wrap: wrap;\n}\n.os_blog_avatar {\n  width: 50px;\n  height: 50px;\n  border-radius: 50%;\n  background: linear-gradient(135deg, #1260a0, #107ec2);\n  display: flex;\n  align-items: center;\n  justify-content: center;\n  color: #fff;\n  font-weight: 700;\n  font-size: 18px;\n  flex-shrink: 0;\n}\n.os_blog_byline_text {\n  font-size: 14px;\n  color: #606060;\n  line-height: 1.5;\n}\n.os_blog_byline_text a {\n  color: #1260a0;\n  text-decoration: none;\n}\n.os_blog_byline_text a:hover {\n  text-decoration: underline;\n}\n.os_blog_updated {\n  font-size: 13px;\n  color: #888;\n}\n.os_blog_disclosure {\n  background: #f8f9fa;\n  border-left: 4px solid #1260a0;\n  padding: 14px 18px;\n  margin-bottom: 30px;\n  font-size: 13px;\n  color: #606060;\n  line-height: 1.6;\n  border-radius: 0 6px 6px 0;\n}\n.os_blog_toc {\n  background: #fff;\n  border: 1px solid #e2e6ea;\n  border-radius: 8px;\n  padding: 24px 28px;\n  margin-bottom: 10px;\n}\n.os_blog_toc h3 {\n  font-size: 16px;\n  font-weight: 700;\n  color: #3f3f3f;\n  margin-bottom: 14px;\n}\n.os_blog_toc ol {\n  padding-left: 20px;\n  margin: 0;\n}\n.os_blog_toc li {\n  margin-bottom: 6px;\n  font-size: 14px;\n  line-height: 1.5;\n}\n.os_blog_toc a {\n  color: #1260a0;\n  text-decoration: none;\n}\n.os_blog_toc a:hover {\n  text-decoration: underline;\n}\n<\/style>\n\n<div class=\"os_blog_header\">\n  <div class=\"os_blog_byline\">\n    <div class=\"os_blog_avatar\">AX<\/div>\n    <div class=\"os_blog_byline_text\">\n      <strong>Written by Amanda Xie<\/strong>, Digital Marketing Manager, Ownsmile<br>\n      <a href=\"https:\/\/www.linkedin.com\/in\/amanda-xie-260964150\/\" target=\"_blank\" rel=\"noopener\">LinkedIn<\/a>\n      &middot; Peer reviewed by <a href=\"https:\/\/www.linkedin.com\/in\/fiona-chiu-80aa68279\/\" target=\"_blank\" rel=\"noopener\">Fiona Chiu<\/a>\n      <span class=\"os_blog_updated\"> &middot; Last Updated: April 2026<\/span>\n    <\/div>\n  <\/div>\n\n  <div class=\"os_blog_disclosure\">\n    <strong>Disclosure:<\/strong> Ownsmile manufactures zirconia blocks. This article provides educational information based on published peer-reviewed research. All clinical data is independently sourced and cited.\n  <\/div>\n\n  <div class=\"os_blog_toc\">\n    <h3>Table of contents<\/h3>\n    <ol>\n      <li><a href=\"#os_sec_intro\">Introduction<\/a><\/li>\n      <li><a href=\"#os_sec_flowchart\">Quick-reference decision flowchart<\/a><\/li>\n      <li><a href=\"#os_sec_materials\">Understanding the materials<\/a><\/li>\n      <li><a href=\"#os_sec_generations\">The zirconia generation gap: 3Y vs 4Y vs 5Y<\/a><\/li>\n      <li><a href=\"#os_sec_aesthetics\">Aesthetics: translucency, color matching, and the enamel gap<\/a><\/li>\n      <li><a href=\"#os_sec_mechanical\">Mechanical performance<\/a><\/li>\n      <li><a href=\"#os_sec_survival\">Clinical survival rates<\/a><\/li>\n      <li><a href=\"#os_sec_indications\">Clinical indications<\/a><\/li>\n      <li><a href=\"#os_sec_thickness\">Preparation design and minimum thickness<\/a><\/li>\n      <li><a href=\"#os_sec_cementation\">Cementation protocols<\/a><\/li>\n      <li><a href=\"#os_sec_wear\">Opposing tooth wear<\/a><\/li>\n      <li><a href=\"#os_sec_new\">New developments (2024-2026)<\/a><\/li>\n      <li><a href=\"#os_sec_products\">Ownsmile zirconia product guide<\/a><\/li>\n      <li><a href=\"#os_sec_myths\">Myths vs facts<\/a><\/li>\n      <li><a href=\"#os_sec_faq\">FAQ<\/a><\/li>\n      <li><a href=\"#os_sec_conclusion\">Conclusion<\/a><\/li>\n      <li><a href=\"#os_sec_refs\">References<\/a><\/li>\n    <\/ol>\n  <\/div>\n<\/div>\n\n<script>\n(function(){\n  document.querySelectorAll('.os_blog_toc a').forEach(function(link){\n    link.addEventListener('click', function(e){\n      var targetId = this.getAttribute('href').slice(1);\n      var target = document.getElementById(targetId);\n      if(target){\n        e.preventDefault();\n        target.scrollIntoView({behavior:'smooth', block:'start'});\n      }\n    });\n  });\n})();\n<\/script>\n<!-- BLOCK 1 END -->\n\n\n<!-- ============================================================\n  BLOCK 2: INTRODUCTION + DECISION FLOWCHART\n  Paste everything between the START and END markers into\n  a WordPress \"Custom HTML\" block.\n============================================================ -->\n<!-- BLOCK 2 START -->\n<style>\n.os_blog_section {\n  font-family: \"Roboto\", sans-serif;\n  max-width: 900px;\n  margin: 0 auto;\n  padding: 0 20px;\n  color: #3f3f3f;\n  line-height: 1.8;\n}\n.os_blog_section h2 {\n  font-size: 26px;\n  font-weight: 700;\n  color: #1260a0;\n  margin: 40px 0 16px;\n  padding-bottom: 8px;\n  border-bottom: 2px solid #e2e6ea;\n}\n.os_blog_section h3 {\n  font-size: 20px;\n  font-weight: 600;\n  color: #3f3f3f;\n  margin: 30px 0 12px;\n}\n.os_blog_section p {\n  font-size: 16px;\n  color: #606060;\n  margin-bottom: 16px;\n}\n.os_blog_section sup a {\n  color: #1260a0;\n  text-decoration: none;\n  font-size: 11px;\n}\n.os_blog_section sup a:hover {\n  text-decoration: underline;\n}\n.os_blog_flowchart {\n  background: linear-gradient(135deg, #f0f7fc 0%, #e8f2f8 100%);\n  border-radius: 12px;\n  padding: 30px;\n  margin: 24px 0 30px;\n}\n.os_blog_flowchart h3 {\n  text-align: center;\n  color: #1260a0;\n  margin-top: 0;\n  margin-bottom: 20px;\n  font-size: 18px;\n}\n.os_blog_fc_grid {\n  display: grid;\n  grid-template-columns: 1fr 1fr;\n  gap: 14px;\n}\n.os_blog_fc_card {\n  background: #fff;\n  border-radius: 8px;\n  padding: 16px;\n  border-left: 4px solid #1260a0;\n  box-shadow: 0 2px 8px rgba(0,0,0,0.06);\n}\n.os_blog_fc_card .fc_type {\n  font-size: 13px;\n  font-weight: 700;\n  color: #1260a0;\n  text-transform: uppercase;\n  letter-spacing: 0.04em;\n  margin-bottom: 6px;\n}\n.os_blog_fc_card .fc_rec {\n  font-size: 14px;\n  color: #3f3f3f;\n  line-height: 1.5;\n}\n.os_blog_fc_card .fc_rec strong {\n  color: #1260a0;\n}\n.os_blog_fc_card .fc_note {\n  font-size: 12px;\n  color: #888;\n  margin-top: 4px;\n}\n@media (max-width: 768px) {\n  .os_blog_fc_grid {\n    grid-template-columns: 1fr;\n  }\n}\n<\/style>\n\n<div class=\"os_blog_section\">\n  <h2 id=\"os_sec_intro\">1. Introduction<\/h2>\n  <p>A patient presents with a fractured premolar. The tooth is endodontically treated, moderately discolored, and the patient grinds at night. Do you reach for lithium disilicate or zirconia?<\/p>\n  <p>The answer depends on the case. Both materials are well-established all-ceramic options, but they solve different problems. Choosing between them, or knowing when to combine them, requires a working knowledge of their mechanical behavior, optical properties, and clinical evidence.<\/p>\n  <p>Neither material is universally better. This article goes through the evidence for each clinical scenario so you can match the material to the situation rather than defaulting to habit.<\/p>\n\n  <h2 id=\"os_sec_flowchart\">2. Quick-reference decision flowchart<\/h2>\n\n  <div class=\"os_blog_flowchart\">\n    <h3>What type of restoration?<\/h3>\n    <div class=\"os_blog_fc_grid\">\n      <div class=\"os_blog_fc_card\">\n        <div class=\"fc_type\">Single crown (anterior)<\/div>\n        <div class=\"fc_rec\">&#8594; <strong>Lithium disilicate<\/strong> (first choice) or HT\/5Y zirconia<\/div>\n        <div class=\"fc_note\">Refs: [1,2]<\/div>\n      <\/div>\n      <div class=\"os_blog_fc_card\">\n        <div class=\"fc_type\">Single crown (posterior)<\/div>\n        <div class=\"fc_rec\">Bruxism? Yes: <strong>3Y zirconia + nightguard<\/strong><br>No: <strong>Zirconia<\/strong> (first) or lithium disilicate (bonded)<\/div>\n        <div class=\"fc_note\">Refs: [4,17]<\/div>\n      <\/div>\n      <div class=\"os_blog_fc_card\">\n        <div class=\"fc_type\">Veneer \/ inlay \/ onlay<\/div>\n        <div class=\"fc_rec\">&#8594; <strong>Lithium disilicate<\/strong> or <strong>ultra-translucent zirconia<\/strong> (5Y-TZP)<br>Both require adhesive bonding; zirconia uses APC protocol (sandblast + MDP primer + resin cement)<\/div>\n        <div class=\"fc_note\">LS&#8322; has superior translucency; zirconia has higher fracture resistance and no radial crack risk<\/div>\n      <\/div>\n      <div class=\"os_blog_fc_card\">\n        <div class=\"fc_type\">3-unit bridge (anterior)<\/div>\n        <div class=\"fc_rec\">&#8594; <strong>Lithium disilicate or HT zirconia<\/strong><\/div>\n        <div class=\"fc_note\">Refs: [17]<\/div>\n      <\/div>\n      <div class=\"os_blog_fc_card\">\n        <div class=\"fc_type\">3-unit bridge (posterior)<\/div>\n        <div class=\"fc_rec\">&#8594; <strong>Zirconia<\/strong><\/div>\n        <div class=\"fc_note\">Refs: [4,17]<\/div>\n      <\/div>\n      <div class=\"os_blog_fc_card\">\n        <div class=\"fc_type\">4+ unit bridge<\/div>\n        <div class=\"fc_rec\">&#8594; <strong>Zirconia only<\/strong><\/div>\n        <div class=\"fc_note\">Refs: [1,4]<\/div>\n      <\/div>\n      <div class=\"os_blog_fc_card\">\n        <div class=\"fc_type\">Implant crown (anterior)<\/div>\n        <div class=\"fc_rec\">&#8594; <strong>Lithium disilicate on Ti-base<\/strong><\/div>\n        <div class=\"fc_note\">Refs: [5]<\/div>\n      <\/div>\n      <div class=\"os_blog_fc_card\">\n        <div class=\"fc_type\">Implant crown (posterior)<\/div>\n        <div class=\"fc_rec\">&#8594; <strong>Zirconia<\/strong><\/div>\n        <div class=\"fc_note\">Refs: [5]<\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n<!-- BLOCK 2 END -->\n\n\n<!-- ============================================================\n  BLOCK 3: UNDERSTANDING MATERIALS + ZIRCONIA GENERATIONS + CHART\n  Paste everything between the START and END markers into\n  a WordPress \"Custom HTML\" block.\n  NOTE: This block loads Chart.js \u2014 place it BEFORE blocks 4, 5, 7\n============================================================ -->\n<!-- BLOCK 3 START -->\n<style>\n.os_blog_s3 {\n  font-family: \"Roboto\", sans-serif;\n  max-width: 900px;\n  margin: 0 auto;\n  padding: 0 20px;\n  color: #3f3f3f;\n  line-height: 1.8;\n}\n.os_blog_s3 h2 {\n  font-size: 26px;\n  font-weight: 700;\n  color: #1260a0;\n  margin: 40px 0 16px;\n  padding-bottom: 8px;\n  border-bottom: 2px solid #e2e6ea;\n}\n.os_blog_s3 h3 {\n  font-size: 20px;\n  font-weight: 600;\n  color: #3f3f3f;\n  margin: 30px 0 12px;\n}\n.os_blog_s3 p {\n  font-size: 16px;\n  color: #606060;\n  margin-bottom: 16px;\n}\n.os_blog_s3 sup a {\n  color: #1260a0;\n  text-decoration: none;\n  font-size: 11px;\n}\n.os_blog_bestfor {\n  background: #f0f7fc;\n  border-radius: 6px;\n  padding: 10px 16px;\n  font-size: 14px;\n  color: #1260a0;\n  font-weight: 500;\n  margin: 8px 0 20px;\n}\n.os_blog_chart_wrap {\n  background: #fff;\n  border-radius: 12px;\n  padding: 24px;\n  margin: 24px 0 30px;\n  box-shadow: 0 2px 12px rgba(0,0,0,0.06);\n  border: 1px solid #e2e6ea;\n}\n.os_blog_chart_wrap h4 {\n  text-align: center;\n  font-size: 16px;\n  font-weight: 600;\n  color: #3f3f3f;\n  margin-bottom: 16px;\n}\n.os_blog_chart_container {\n  position: relative;\n  width: 100%;\n  max-width: 850px;\n  margin: 0 auto;\n}\n.os_blog_chart_source {\n  text-align: center;\n  font-size: 12px;\n  color: #999;\n  margin-top: 12px;\n}\n<\/style>\n\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/chart.js\"><\/script>\n\n<div class=\"os_blog_s3\">\n  <h2 id=\"os_sec_materials\">3. Understanding the materials<\/h2>\n\n  <h3>What is lithium disilicate?<\/h3>\n  <p>Lithium disilicate (Li<sub>2<\/sub>Si<sub>2<\/sub>O<sub>5<\/sub>) is a glass-ceramic. Its microstructure consists of needle-like crystals densely interlocked within a glass matrix.<sup><a href=\"#ref-1\">[1]<\/a><\/sup> The crystal network provides strength. The glass matrix lets light through, which is why the material looks translucent on teeth.<\/p>\n  <p>The most widely used form is IPS e.max CAD (Ivoclar), milled in a partially crystallized &#8220;blue&#8221; state at roughly 130 MPa, then crystallized in a furnace at 840&deg;C. After firing, flexural strength reaches 360&ndash;530 MPa.<sup><a href=\"#ref-21\">[21]<\/a><\/sup> The range reflects the difference between ISO-certified minimum values (360 MPa) and manufacturer testing means (530 MPa). Both are legitimate data points.<sup><a href=\"#ref-21\">[21]<\/a><\/sup><\/p>\n  <p>Lithium disilicate bonds well. The glass matrix can be etched with hydrofluoric acid, creating a microporous surface that locks onto silane and resin cement.<sup><a href=\"#ref-18\">[18]<\/a><\/sup><sup><a href=\"#ref-28\">[28]<\/a><\/sup> This adhesive bond adds functional strength and allows thinner preparations, as little as 0.4 mm for veneers.<sup><a href=\"#ref-21\">[21]<\/a><\/sup><\/p>\n\n  <h3>What is zirconia?<\/h3>\n  <p>Zirconia (ZrO<sub>2<\/sub>, zirconium dioxide) is not a metal.<sup><a href=\"#ref-19\">[19]<\/a><\/sup><sup><a href=\"#ref-20\">[20]<\/a><\/sup> This misconception comes up in patient conversations and even among some practitioners.<sup><a href=\"#ref-2\">[2]<\/a><\/sup> Zirconia is a polycrystalline ceramic. Its structure consists entirely of tightly packed crystals with no glass phase.<\/p>\n  <p>Pure zirconia undergoes a destructive phase transformation when cooled from sintering temperature. Manufacturers add yttrium oxide (yttria) as a stabilizer, creating yttria-stabilized tetragonal zirconia polycrystal, or Y-TZP.<sup><a href=\"#ref-1\">[1]<\/a><\/sup><sup><a href=\"#ref-12\">[12]<\/a><\/sup><\/p>\n  <p>The amount of yttria determines the material&#8217;s clinical behavior. More yttria means more translucency but less strength. This trade-off produces three distinct generations of dental zirconia, each suited to different situations.<\/p>\n\n  <h2 id=\"os_sec_generations\">4. The zirconia generation gap: 3Y vs 4Y vs 5Y<\/h2>\n  <p>The yttria content creates materials that behave very differently from each other.<sup><a href=\"#ref-12\">[12]<\/a><\/sup><sup><a href=\"#ref-14\">[14]<\/a><\/sup> Treating &#8220;zirconia&#8221; as a single category is a common source of confusion in material selection.<\/p>\n\n  <h3>3Y-TZP (3 mol% yttria), full-strength<\/h3>\n  <p>This is the original dental zirconia. With 3 mol% yttria, roughly 90% of the crystal structure remains in the tetragonal phase. When a crack begins to propagate, nearby tetragonal crystals transform to the monoclinic phase, expanding by about 4% in volume. This expansion compresses the crack tip and arrests further propagation. The mechanism is called transformation toughening.<sup><a href=\"#ref-1\">[1]<\/a><\/sup><sup><a href=\"#ref-12\">[12]<\/a><\/sup><\/p>\n  <p>Flexural strength: 1,000&ndash;1,500 MPa. Fracture toughness: 3.5&ndash;5.0 MPa&middot;m<sup>1\/2<\/sup>.<sup><a href=\"#ref-3\">[3]<\/a><\/sup><sup><a href=\"#ref-23\">[23]<\/a><\/sup><sup><a href=\"#ref-24\">[24]<\/a><\/sup> That makes 3Y-TZP two to three times stronger than lithium disilicate. The trade-off is opacity, with translucency parameter values around 6.96 at 1 mm thickness.<sup><a href=\"#ref-3\">[3]<\/a><\/sup><\/p>\n  <div class=\"os_blog_bestfor\">Best for: posterior crowns, long-span bridges, bruxism cases, high-stress restorations.<\/div>\n\n  <h3>4Y-TZP (4 mol% yttria), balanced<\/h3>\n  <p>Adding more yttria shifts part of the crystal structure from tetragonal to cubic. The cubic phase does not undergo transformation toughening, so strength drops to 600&ndash;1,000 MPa.<sup><a href=\"#ref-14\">[14]<\/a><\/sup><sup><a href=\"#ref-27\">[27]<\/a><\/sup> Translucency improves but does not match lithium disilicate.<\/p>\n  <div class=\"os_blog_bestfor\">Best for: anterior and posterior crowns, short-span bridges where you need reasonable aesthetics without sacrificing too much strength.<\/div>\n\n  <h3>5Y-TZP (5 mol% yttria), ultra-translucent<\/h3>\n  <p>At 5 mol% yttria, more than 50% of the crystal structure is cubic.<sup><a href=\"#ref-12\">[12]<\/a><\/sup> Transformation toughening is largely eliminated. Fracture toughness drops to 2.0&ndash;2.7 MPa&middot;m<sup>1\/2<\/sup>, overlapping with lithium disilicate.<sup><a href=\"#ref-1\">[1]<\/a><\/sup><sup><a href=\"#ref-14\">[14]<\/a><\/sup> Flexural strength falls to 500&ndash;800 MPa.<sup><a href=\"#ref-3\">[3]<\/a><\/sup><sup><a href=\"#ref-24\">[24]<\/a><\/sup><\/p>\n  <p>The translucency gain is real: 5Y-TZP achieves a translucency parameter of about 8.30 at 1 mm.<sup><a href=\"#ref-3\">[3]<\/a><\/sup> But even at the high end, zirconia reaches only about 73% of the translucency of lithium disilicate at equal thickness.<sup><a href=\"#ref-2\">[2]<\/a><\/sup><\/p>\n  <div class=\"os_blog_bestfor\">Best for: anterior crowns where aesthetics are the primary concern and functional loads are manageable.<\/div>\n\n  <h3>The clinical takeaway<\/h3>\n  <p>Moving from 3Y to 5Y cuts flexural strength roughly in half while gaining only moderate translucency improvements.<sup><a href=\"#ref-3\">[3]<\/a><\/sup><sup><a href=\"#ref-14\">[14]<\/a><\/sup> The strength-translucency trade-off is not linear, and it is not favorable at the extreme translucent end.<\/p>\n  <p>This is why multilayer gradient zirconia has become the standard. These discs transition from 3Y in the cervical region to 5Y at the incisal, providing strength where it matters and aesthetics where they show.<\/p>\n\n  <div class=\"os_blog_chart_wrap\">\n    <h4>Flexural strength comparison (MPa)<\/h4>\n    <div class=\"os_blog_chart_container\">\n      <canvas id=\"os_chart_strength\" height=\"320\"><\/canvas>\n    <\/div>\n    <noscript>\n      <table style=\"width:100%;border-collapse:collapse;font-size:14px;\">\n        <tr><th style=\"text-align:left;padding:6px;border-bottom:1px solid #ddd;\">Material<\/th><th style=\"text-align:right;padding:6px;border-bottom:1px solid #ddd;\">MPa<\/th><\/tr>\n        <tr><td style=\"padding:6px;\">Feldspathic porcelain<\/td><td style=\"text-align:right;padding:6px;\">60&ndash;120<\/td><\/tr>\n        <tr><td style=\"padding:6px;\">Lithium disilicate (e.max CAD)<\/td><td style=\"text-align:right;padding:6px;\">360&ndash;530<\/td><\/tr>\n        <tr><td style=\"padding:6px;\">CEREC Tessera (ALD)<\/td><td style=\"text-align:right;padding:6px;\">463&ndash;700*<\/td><\/tr>\n        <tr><td style=\"padding:6px;\">5Y-TZP zirconia<\/td><td style=\"text-align:right;padding:6px;\">550&ndash;800<\/td><\/tr>\n        <tr><td style=\"padding:6px;\">4Y-TZP zirconia<\/td><td style=\"text-align:right;padding:6px;\">750&ndash;1,000<\/td><\/tr>\n        <tr><td style=\"padding:6px;\">3Y-TZP zirconia<\/td><td style=\"text-align:right;padding:6px;\">1,000&ndash;1,400<\/td><\/tr>\n      <\/table>\n      <p style=\"font-size:12px;color:#999;\">*Tessera: 700 MPa is manufacturer-reported; independent testing measured ~463 MPa.<\/p>\n    <\/noscript>\n    <div class=\"os_blog_chart_source\">Sources: Ivoclar [21]; Jerman et al. 2021 [14]; Bernauer et al. 2025; Holman et al. 2020; Dentsply Sirona [26]<\/div>\n  <\/div>\n<\/div>\n\n<script>\n(function(){\n  var ctx = document.getElementById('os_chart_strength');\n  if(!ctx) return;\n  new Chart(ctx, {\n    type: 'bar',\n    data: {\n      labels: [\n        'Feldspathic porcelain',\n        'Lithium disilicate\\n(e.max CAD)',\n        'CEREC Tessera\\n(ALD)',\n        '5Y-TZP\\nzirconia',\n        '4Y-TZP\\nzirconia',\n        '3Y-TZP\\nzirconia'\n      ],\n      datasets: [{\n        label: 'Low range (MPa)',\n        data: [60, 360, 463, 550, 750, 1000],\n        backgroundColor: [\n          '#bdc3c7','#27ae60','#2ecc71','#e67e22','#f39c12','#1260a0'\n        ],\n        borderRadius: 4\n      },{\n        label: 'High range (MPa)',\n        data: [60, 170, 237, 250, 250, 400],\n        backgroundColor: [\n          'rgba(189,195,199,0.4)','rgba(39,174,96,0.4)','rgba(46,204,113,0.4)','rgba(230,126,34,0.4)','rgba(243,156,18,0.4)','rgba(18,96,160,0.4)'\n        ],\n        borderRadius: 4\n      }]\n    },\n    options: {\n      indexAxis: 'y',\n      responsive: true,\n      maintainAspectRatio: false,\n      plugins: {\n        legend: { display: false },\n        tooltip: {\n          callbacks: {\n            label: function(context){\n              var datasetIdx = context.datasetIndex;\n              var idx = context.dataIndex;\n              var ranges = ['60-120','360-530','463-700*','550-800','750-1,000','1,000-1,400'];\n              return datasetIdx === 0 ? ranges[idx] + ' MPa' : '';\n            }\n          }\n        }\n      },\n      scales: {\n        x: {\n          stacked: true,\n          max: 1500,\n          title: { display: true, text: 'Flexural Strength (MPa)', font: { size: 13 } },\n          grid: { color: 'rgba(0,0,0,0.06)' }\n        },\n        y: {\n          stacked: true,\n          grid: { display: false },\n          ticks: { font: { size: 12 } }\n        }\n      }\n    }\n  });\n})();\n<\/script>\n<!-- BLOCK 3 END -->\n\n\n<!-- ============================================================\n  BLOCK 4: AESTHETICS + MECHANICAL PERFORMANCE + TRANSLUCENCY CHART\n  Paste everything between the START and END markers into\n  a WordPress \"Custom HTML\" block.\n============================================================ -->\n<!-- BLOCK 4 START -->\n<style>\n.os_blog_s4 {\n  font-family: \"Roboto\", sans-serif;\n  max-width: 900px;\n  margin: 0 auto;\n  padding: 0 20px;\n  color: #3f3f3f;\n  line-height: 1.8;\n}\n.os_blog_s4 h2 { font-size: 26px; font-weight: 700; color: #1260a0; margin: 40px 0 16px; padding-bottom: 8px; border-bottom: 2px solid #e2e6ea; }\n.os_blog_s4 h3 { font-size: 20px; font-weight: 600; color: #3f3f3f; margin: 30px 0 12px; }\n.os_blog_s4 p { font-size: 16px; color: #606060; margin-bottom: 16px; }\n.os_blog_s4 sup a { color: #1260a0; text-decoration: none; font-size: 11px; }\n.os_blog_s4 ul { padding-left: 24px; margin-bottom: 16px; }\n.os_blog_s4 li { font-size: 15px; color: #606060; margin-bottom: 6px; line-height: 1.6; }\n.os_blog_chart_wrap { background: #fff; border-radius: 12px; padding: 24px; margin: 24px 0 30px; box-shadow: 0 2px 12px rgba(0,0,0,0.06); border: 1px solid #e2e6ea; }\n.os_blog_chart_wrap h4 { text-align: center; font-size: 16px; font-weight: 600; color: #3f3f3f; margin-bottom: 16px; }\n.os_blog_chart_container { position: relative; width: 100%; max-width: 850px; margin: 0 auto; }\n.os_blog_chart_source { text-align: center; font-size: 12px; color: #999; margin-top: 12px; }\n<\/style>\n\n<div class=\"os_blog_s4\">\n  <h2 id=\"os_sec_aesthetics\">5. Aesthetics: translucency, color matching, and the enamel gap<\/h2>\n  <p>Whether a restoration looks natural depends on how it handles light. Translucency, the degree to which light passes through rather than bouncing off, is what separates a restoration that blends in from one that looks like an opaque cap.<\/p>\n\n  <h3>Measuring translucency<\/h3>\n  <p>Translucency parameter (TP) is measured as the color difference (&Delta;E) between a specimen viewed against a white versus black background. Higher TP means greater translucency. Natural enamel has a TP of approximately 18.7 and dentin about 16.4.<sup><a href=\"#ref-3\">[3]<\/a><\/sup><\/p>\n\n  <div class=\"os_blog_chart_wrap\">\n    <h4>Translucency parameter comparison at 1 mm thickness (&Delta;E)<\/h4>\n    <div class=\"os_blog_chart_container\">\n      <canvas id=\"os_chart_translucency\" height=\"280\"><\/canvas>\n    <\/div>\n    <noscript>\n      <table style=\"width:100%;border-collapse:collapse;font-size:14px;\">\n        <tr><th style=\"text-align:left;padding:6px;border-bottom:1px solid #ddd;\">Material<\/th><th style=\"text-align:right;padding:6px;border-bottom:1px solid #ddd;\">TP (&Delta;E)<\/th><\/tr>\n        <tr><td style=\"padding:6px;\">Natural enamel<\/td><td style=\"text-align:right;\">18.7<\/td><\/tr>\n        <tr><td style=\"padding:6px;\">Natural dentin<\/td><td style=\"text-align:right;\">16.4<\/td><\/tr>\n        <tr><td style=\"padding:6px;\">e.max CAD HT<\/td><td style=\"text-align:right;\">12.64<\/td><\/tr>\n        <tr><td style=\"padding:6px;\">e.max CAD LT<\/td><td style=\"text-align:right;\">9.28<\/td><\/tr>\n        <tr><td style=\"padding:6px;\">5Y-PSZ (Katana UTML)<\/td><td style=\"text-align:right;\">8.30<\/td><\/tr>\n        <tr><td style=\"padding:6px;\">3Y-TZP (Katana HT)<\/td><td style=\"text-align:right;\">6.96<\/td><\/tr>\n      <\/table>\n    <\/noscript>\n    <div class=\"os_blog_chart_source\">Source: Kwon et al. 2018 [3]<\/div>\n  <\/div>\n\n  <h3>What this means in practice<\/h3>\n  <p>Lithium disilicate still produces the most translucent all-ceramic restorations. Its glass matrix transmits and refracts light in a way that closely matches natural tooth structure.<sup><a href=\"#ref-1\">[1]<\/a><\/sup><sup><a href=\"#ref-2\">[2]<\/a><\/sup> For anterior veneers and single crowns on vital, lightly colored teeth, lithium disilicate gives the most lifelike results.<\/p>\n  <p>Zirconia has narrowed the gap. Ultra-translucent 5Y formulations sit between traditional zirconia and lithium disilicate, and some products (Katana UTML at 43% transmittance, for example) approach lithium disilicate at specific thicknesses.<sup><a href=\"#ref-25\">[25]<\/a><\/sup> But the difference persists at clinically relevant thicknesses of 1.0&ndash;1.5 mm.<sup><a href=\"#ref-3\">[3]<\/a><\/sup><\/p>\n  <p>When you need to block underlying discoloration, such as a metal post or a dark stump, zirconia&#8217;s lower translucency works in your favor. A 3Y coping masks discoloration more effectively than lithium disilicate.<sup><a href=\"#ref-1\">[1]<\/a><\/sup><\/p>\n\n  <h3>Color stability<\/h3>\n  <p>Both materials hold color well over time. Neither stains meaningfully under normal oral conditions. Shade matching accuracy depends more on the lab workflow (scanning, shade selection, staining\/glazing technique) than on the material itself.<sup><a href=\"#ref-1\">[1]<\/a><\/sup><\/p>\n\n  <h2 id=\"os_sec_mechanical\">6. Mechanical performance<\/h2>\n\n  <h3>Flexural strength<\/h3>\n  <p>At the high end, the gap is large. Full-strength 3Y-TZP delivers 1,000&ndash;1,500 MPa, roughly three times the 360&ndash;530 MPa of lithium disilicate.<sup><a href=\"#ref-3\">[3]<\/a><\/sup><sup><a href=\"#ref-21\">[21]<\/a><\/sup><sup><a href=\"#ref-23\">[23]<\/a><\/sup> BruxZir Full-Strength exceeds 1,100 MPa<sup><a href=\"#ref-23\">[23]<\/a><\/sup>; 3M Lava Plus reaches 1,200&ndash;1,500 MPa<sup><a href=\"#ref-27\">[27]<\/a><\/sup>; Katana HT measures 1,194 MPa.<sup><a href=\"#ref-3\">[3]<\/a><\/sup><\/p>\n  <p>But the gap narrows as zirconia becomes more translucent. BruxZir Esthetic (4Y) drops to 870&ndash;980 MPa.<sup><a href=\"#ref-23\">[23]<\/a><\/sup> 3M Lava Esthetic (5Y) sits at 800 MPa.<sup><a href=\"#ref-24\">[24]<\/a><\/sup> Katana UTML (5Y) measures 688 MPa.<sup><a href=\"#ref-3\">[3]<\/a><\/sup><\/p>\n  <p>Worth noting: CEREC Tessera, Dentsply Sirona&#8217;s advanced lithium disilicate, exceeds 700 MPa<sup><a href=\"#ref-26\">[26]<\/a><\/sup>, which is stronger than some 5Y zirconia products.<\/p>\n\n  <h3>Fracture toughness<\/h3>\n  <p>Fracture toughness (K<sub>Ic<\/sub>) measures resistance to crack propagation. It is arguably more clinically relevant than raw flexural strength.<sup><a href=\"#ref-1\">[1]<\/a><\/sup><sup><a href=\"#ref-14\">[14]<\/a><\/sup><\/p>\n  <ul>\n    <li>3Y-TZP: 3.5&ndash;5.0 MPa&middot;m<sup>1\/2<\/sup><\/li>\n    <li>4Y-TZP: 2.5&ndash;3.5 MPa&middot;m<sup>1\/2<\/sup><\/li>\n    <li>5Y-TZP: 2.0&ndash;2.7 MPa&middot;m<sup>1\/2<\/sup><\/li>\n    <li>Lithium disilicate: 2.0&ndash;2.5 MPa&middot;m<sup>1\/2<\/sup><\/li>\n  <\/ul>\n  <p>5Y-TZP fracture toughness overlaps with lithium disilicate. The cubic phase in 5Y zirconia cannot undergo transformation toughening.<sup><a href=\"#ref-12\">[12]<\/a><\/sup> If you are selecting ultra-translucent zirconia assuming it is mechanically superior to lithium disilicate, this overlap is worth knowing about.<\/p>\n\n  <h3>What fails and why<\/h3>\n  <p>Lithium disilicate fails by bulk fracture. The restoration cracks through its full thickness. Monolithic lithium disilicate has a clinical chipping rate of approximately 5%.<sup><a href=\"#ref-11\">[11]<\/a><\/sup><\/p>\n  <p>Zirconia failure depends on the design. Veneered zirconia has a five-year chipping rate of the porcelain veneer layer of about 5%.<sup><a href=\"#ref-4\">[4]<\/a><\/sup> The zirconia core itself rarely fractures. Monolithic zirconia, where no veneering porcelain is used, drops the chipping rate to approximately 1.4%.<sup><a href=\"#ref-11\">[11]<\/a><\/sup><\/p>\n  <p>The industry has shifted toward monolithic zirconia for this reason. Removing the veneering porcelain removes the weakest part of the system.<\/p>\n<\/div>\n\n<script>\n(function(){\n  var ctx = document.getElementById('os_chart_translucency');\n  if(!ctx) return;\n  new Chart(ctx, {\n    type: 'bar',\n    data: {\n      labels: ['Natural\\nenamel','Natural\\ndentin','e.max CAD\\nHT','e.max CAD\\nLT','5Y-PSZ\\n(Katana UTML)','3Y-TZP\\n(Katana HT)'],\n      datasets: [{\n        label: 'TP (\u0394E)',\n        data: [18.7, 16.4, 12.64, 9.28, 8.30, 6.96],\n        backgroundColor: ['#95a5a6','#95a5a6','#27ae60','#2ecc71','#e67e22','#1260a0'],\n        borderRadius: 4\n      }]\n    },\n    options: {\n      indexAxis: 'y',\n      responsive: true,\n      maintainAspectRatio: false,\n      plugins: {\n        legend: { display: false },\n        tooltip: {\n          callbacks: {\n            label: function(c){ return 'TP = ' + c.raw + ' \u0394E'; }\n          }\n        }\n      },\n      scales: {\n        x: {\n          max: 22,\n          title: { display: true, text: 'Translucency Parameter (\u0394E)', font: { size: 13 } },\n          grid: { color: 'rgba(0,0,0,0.06)' }\n        },\n        y: { grid: { display: false }, ticks: { font: { size: 12 } } }\n      }\n    }\n  });\n})();\n<\/script>\n<!-- BLOCK 4 END -->\n\n\n<!-- ============================================================\n  BLOCK 5: CLINICAL SURVIVAL RATES + CHART\n  Paste everything between the START and END markers into\n  a WordPress \"Custom HTML\" block.\n============================================================ -->\n<!-- BLOCK 5 START -->\n<style>\n.os_blog_s5 {\n  font-family: \"Roboto\", sans-serif;\n  max-width: 900px;\n  margin: 0 auto;\n  padding: 0 20px;\n  color: #3f3f3f;\n  line-height: 1.8;\n}\n.os_blog_s5 h2 { font-size: 26px; font-weight: 700; color: #1260a0; margin: 40px 0 16px; padding-bottom: 8px; border-bottom: 2px solid #e2e6ea; }\n.os_blog_s5 h3 { font-size: 20px; font-weight: 600; color: #3f3f3f; margin: 30px 0 12px; }\n.os_blog_s5 p { font-size: 16px; color: #606060; margin-bottom: 16px; }\n.os_blog_s5 ul { padding-left: 24px; margin-bottom: 16px; }\n.os_blog_s5 li { font-size: 15px; color: #606060; margin-bottom: 6px; }\n.os_blog_s5 sup a { color: #1260a0; text-decoration: none; font-size: 11px; }\n.os_blog_chart_wrap { background: #fff; border-radius: 12px; padding: 24px; margin: 24px 0 30px; box-shadow: 0 2px 12px rgba(0,0,0,0.06); border: 1px solid #e2e6ea; }\n.os_blog_chart_wrap h4 { text-align: center; font-size: 16px; font-weight: 600; color: #3f3f3f; margin-bottom: 16px; }\n.os_blog_chart_container { position: relative; width: 100%; max-width: 850px; margin: 0 auto; }\n.os_blog_chart_source { text-align: center; font-size: 12px; color: #999; margin-top: 12px; }\n<\/style>\n\n<div class=\"os_blog_s5\">\n  <h2 id=\"os_sec_survival\">7. Clinical survival rates<\/h2>\n\n  <h3>Lithium disilicate single crowns<\/h3>\n  <ul>\n    <li>5-year survival: 96.6&ndash;97.8%<sup><a href=\"#ref-4\">[4]<\/a><\/sup><sup><a href=\"#ref-6\">[6]<\/a><\/sup><\/li>\n    <li>8-year survival: 94.8%<sup><a href=\"#ref-1\">[1]<\/a><\/sup><\/li>\n    <li>10-year survival: 96.7% for single crowns<sup><a href=\"#ref-6\">[6]<\/a><\/sup><\/li>\n    <li>Up to 15 years: 95.2% average<sup><a href=\"#ref-21\">[21]<\/a><\/sup><\/li>\n  <\/ul>\n\n  <h3>Zirconia single crowns<\/h3>\n  <ul>\n    <li>5-year (veneered, tooth-supported): 92.1%<sup><a href=\"#ref-4\">[4]<\/a><\/sup><\/li>\n    <li>5-year (monolithic, posterior): 98%<sup><a href=\"#ref-11\">[11]<\/a><\/sup><\/li>\n    <li>5-year (implant-supported): 97.6%<sup><a href=\"#ref-5\">[5]<\/a><\/sup><\/li>\n    <li>10-year: approximately 90&ndash;93% (aggregate)<sup><a href=\"#ref-4\">[4]<\/a><\/sup><\/li>\n  <\/ul>\n\n  <h3>Head-to-head<\/h3>\n  <p>A 2025 comparison study reported five-year survival of 94.0% for zirconia versus 89.0% for lithium disilicate. The difference was not statistically significant.<sup><a href=\"#ref-9\">[9]<\/a><\/sup><\/p>\n\n  <div class=\"os_blog_chart_wrap\">\n    <h4>Clinical survival rates: 5-year and 10-year comparison<\/h4>\n    <div class=\"os_blog_chart_container\">\n      <canvas id=\"os_chart_survival\" height=\"300\"><\/canvas>\n    <\/div>\n    <noscript>\n      <table style=\"width:100%;border-collapse:collapse;font-size:14px;\">\n        <tr><th style=\"text-align:left;padding:6px;border-bottom:1px solid #ddd;\">Material<\/th><th style=\"text-align:right;padding:6px;\">5-Year<\/th><th style=\"text-align:right;padding:6px;\">10-Year<\/th><\/tr>\n        <tr><td style=\"padding:6px;\">LS2 single crowns<\/td><td style=\"text-align:right;\">97.2%<\/td><td style=\"text-align:right;\">96.7%<\/td><\/tr>\n        <tr><td style=\"padding:6px;\">Zirconia monolithic<\/td><td style=\"text-align:right;\">98%<\/td><td style=\"text-align:right;\">91.5%<\/td><\/tr>\n        <tr><td style=\"padding:6px;\">Zirconia implant<\/td><td style=\"text-align:right;\">97.6%<\/td><td style=\"text-align:right;\">&#8212;<\/td><\/tr>\n        <tr><td style=\"padding:6px;\">PFM benchmark<\/td><td style=\"text-align:right;\">94.7%<\/td><td style=\"text-align:right;\">95%<\/td><\/tr>\n      <\/table>\n    <\/noscript>\n    <div class=\"os_blog_chart_source\">Sources: Sailer et al. 2015 [4]; Pieger et al. 2014 [6]; Benli et al. 2022 [11]; Pjetursson et al. 2018 [5]<\/div>\n  <\/div>\n\n  <h3>Reading the numbers carefully<\/h3>\n  <p>The lower five-year figure for veneered zirconia (92.1%) reflects chipping of the porcelain veneer layer, not failure of the zirconia core.<sup><a href=\"#ref-4\">[4]<\/a><\/sup> Monolithic zirconia at five years jumps to 98%.<sup><a href=\"#ref-11\">[11]<\/a><\/sup> The material did not fail; the layering technique did.<\/p>\n  <p>Lithium disilicate shows strong long-term numbers for single crowns. But survival drops for fixed dental prostheses (bridges): 70.9% at 10 years for lithium disilicate bridges<sup><a href=\"#ref-6\">[6]<\/a><\/sup> versus substantially better numbers for zirconia bridges. Current guidelines recommend zirconia for any bridge extending to a molar.<sup><a href=\"#ref-17\">[17]<\/a><\/sup><\/p>\n<\/div>\n\n<script>\n(function(){\n  var ctx = document.getElementById('os_chart_survival');\n  if(!ctx) return;\n  new Chart(ctx, {\n    type: 'bar',\n    data: {\n      labels: ['LS\u2082 single\\ncrowns','Zirconia\\nmonolithic','Zirconia\\nimplant','PFM\\nbenchmark','LS\u2082 3-unit\\nFDP'],\n      datasets: [{\n        label: '5-Year',\n        data: [97.2, 98, 97.6, 94.7, 85],\n        backgroundColor: '#27ae60',\n        borderRadius: 4\n      },{\n        label: '10-Year',\n        data: [96.7, 91.5, null, 95, 70.9],\n        backgroundColor: '#1260a0',\n        borderRadius: 4\n      }]\n    },\n    options: {\n      responsive: true,\n      maintainAspectRatio: false,\n      plugins: {\n        legend: { position: 'top', labels: { font: { size: 13 } } },\n        tooltip: {\n          callbacks: {\n            label: function(c){ return c.dataset.label + ': ' + (c.raw !== null ? c.raw + '%' : 'N\/A'); }\n          }\n        }\n      },\n      scales: {\n        y: {\n          min: 60,\n          max: 100,\n          title: { display: true, text: 'Survival Rate (%)', font: { size: 13 } },\n          grid: { color: 'rgba(0,0,0,0.06)' }\n        },\n        x: { grid: { display: false }, ticks: { font: { size: 11 } } }\n      }\n    }\n  });\n})();\n<\/script>\n<!-- BLOCK 5 END -->\n\n\n<!-- ============================================================\n  BLOCK 6: CLINICAL INDICATIONS + THICKNESS + CEMENTATION\n  Paste everything between the START and END markers into\n  a WordPress \"Custom HTML\" block.\n============================================================ -->\n<!-- BLOCK 6 START -->\n<style>\n.os_blog_s6 {\n  font-family: \"Roboto\", sans-serif;\n  max-width: 900px;\n  margin: 0 auto;\n  padding: 0 20px;\n  color: #3f3f3f;\n  line-height: 1.8;\n}\n.os_blog_s6 h2 { font-size: 26px; font-weight: 700; color: #1260a0; margin: 40px 0 16px; padding-bottom: 8px; border-bottom: 2px solid #e2e6ea; }\n.os_blog_s6 h3 { font-size: 20px; font-weight: 600; color: #3f3f3f; margin: 30px 0 12px; }\n.os_blog_s6 p { font-size: 16px; color: #606060; margin-bottom: 16px; }\n.os_blog_s6 sup a { color: #1260a0; text-decoration: none; font-size: 11px; }\n.os_blog_table_wrap {\n  overflow-x: auto;\n  margin: 16px 0 28px;\n  border-radius: 8px;\n  border: 1px solid #e2e6ea;\n}\n.os_blog_table {\n  width: 100%;\n  border-collapse: collapse;\n  font-size: 14px;\n  min-width: 600px;\n}\n.os_blog_table thead th {\n  background: #1260a0;\n  color: #fff;\n  padding: 12px 14px;\n  text-align: left;\n  font-weight: 600;\n  font-size: 13px;\n  white-space: nowrap;\n}\n.os_blog_table tbody td {\n  padding: 10px 14px;\n  border-bottom: 1px solid #eee;\n  color: #606060;\n  vertical-align: top;\n}\n.os_blog_table tbody tr:nth-child(even) { background: #f8fafb; }\n.os_blog_table tbody tr:hover { background: #f0f7fc; }\n.os_blog_table .avoid { color: #c0392b; font-weight: 500; }\n.os_blog_table .rec { color: #1260a0; font-weight: 600; }\n.os_blog_cementation {\n  display: grid;\n  grid-template-columns: 1fr 1fr;\n  gap: 20px;\n  margin: 20px 0 30px;\n}\n.os_blog_cem_col {\n  background: #fff;\n  border-radius: 8px;\n  border: 1px solid #e2e6ea;\n  padding: 20px;\n}\n.os_blog_cem_col h4 {\n  font-size: 15px;\n  font-weight: 700;\n  margin-bottom: 14px;\n  padding-bottom: 8px;\n  border-bottom: 2px solid #e2e6ea;\n}\n.os_blog_cem_col.ld h4 { color: #27ae60; border-bottom-color: #27ae60; }\n.os_blog_cem_col.zr h4 { color: #1260a0; border-bottom-color: #1260a0; }\n.os_blog_cem_col ol {\n  padding-left: 20px;\n  margin: 0;\n}\n.os_blog_cem_col li {\n  font-size: 14px;\n  color: #606060;\n  margin-bottom: 8px;\n  line-height: 1.5;\n}\n@media (max-width: 768px) {\n  .os_blog_cementation { grid-template-columns: 1fr; }\n}\n.os_blog_warning { background: #fff3e0; border-left: 4px solid #e67e22; padding: 14px 18px; margin: 16px 0; font-size: 14px; color: #606060; border-radius: 0 6px 6px 0; }\n.os_blog_warning strong { color: #d35400; }\n<\/style>\n\n<div class=\"os_blog_s6\">\n  <h2 id=\"os_sec_indications\">8. Clinical indications: matching material to situation<\/h2>\n  <p>The following matrix draws on systematic reviews, JADA guidelines, and manufacturer recommendations.<sup><a href=\"#ref-1\">[1]<\/a><\/sup><sup><a href=\"#ref-4\">[4]<\/a><\/sup><sup><a href=\"#ref-5\">[5]<\/a><\/sup><sup><a href=\"#ref-6\">[6]<\/a><\/sup><sup><a href=\"#ref-16\">[16]<\/a><\/sup><sup><a href=\"#ref-17\">[17]<\/a><\/sup><\/p>\n\n  <div class=\"os_blog_table_wrap\">\n    <table class=\"os_blog_table\">\n      <thead>\n        <tr><th>Indication<\/th><th>First Choice<\/th><th>Second Choice<\/th><th>Not Recommended<\/th><\/tr>\n      <\/thead>\n      <tbody>\n  <tr>\n    <td>Anterior crown (esthetic)<\/td>\n    <td class=\"rec\">Lithium disilicate or zirconia (4Y\/5Y)<\/td>\n    <td>&#8212;<\/td>\n    <td>&#8212;<\/td>\n  <\/tr>\n  <tr>\n    <td>Posterior crown (molar)<\/td>\n    <td class=\"rec\">Monolithic zirconia (3Y\/4Y)<\/td>\n    <td>Lithium disilicate (bonded, selective cases)<\/td>\n    <td class=\"avoid\">Lithium disilicate in high-load molars (e.g., second molars)<\/td>\n  <\/tr>\n  <tr>\n    <td>Veneer \/ no-prep veneer<\/td>\n    <td class=\"rec\">Lithium disilicate (preferred)<\/td>\n    <td>Zirconia (5Y, selective cases)<\/td>\n    <td>&#8212;<\/td>\n  <\/tr>\n  <tr>\n    <td>Inlay \/ onlay<\/td>\n    <td class=\"rec\">Lithium disilicate or zirconia<\/td>\n    <td>&#8212;<\/td>\n    <td>&#8212;<\/td>\n  <\/tr>\n  <tr>\n    <td>3-unit anterior bridge<\/td>\n    <td class=\"rec\">Lithium disilicate (bonded) or zirconia<\/td>\n    <td>&#8212;<\/td>\n    <td>&#8212;<\/td>\n  <\/tr>\n  <tr>\n    <td>3-unit posterior bridge<\/td>\n    <td class=\"rec\">Zirconia<\/td>\n    <td>Lithium disilicate (limited to anterior\/premolar-supported cases)<\/td>\n    <td class=\"avoid\">Lithium disilicate extending to molar<\/td>\n  <\/tr>\n  <tr>\n    <td>4+ unit bridge<\/td>\n    <td class=\"rec\">Zirconia only<\/td>\n    <td>&#8212;<\/td>\n    <td class=\"avoid\">Lithium disilicate<\/td>\n  <\/tr>\n  <tr>\n    <td>Implant crown (anterior)<\/td>\n    <td class=\"rec\">Zirconia or lithium disilicate (typically on Ti-base)<\/td>\n    <td>&#8212;<\/td>\n    <td>&#8212;<\/td>\n  <\/tr>\n  <tr>\n    <td>Implant crown (posterior)<\/td>\n    <td class=\"rec\">Zirconia<\/td>\n    <td>&#8212;<\/td>\n    <td>&#8212;<\/td>\n  <\/tr>\n  <tr>\n    <td>Implant bridge<\/td>\n    <td class=\"rec\">Zirconia<\/td>\n    <td>&#8212;<\/td>\n    <td class=\"avoid\">Lithium disilicate<\/td>\n  <\/tr>\n  <tr>\n    <td>Bruxism patient<\/td>\n    <td class=\"rec\">Full-strength zirconia (3Y) + nightguard<\/td>\n    <td>&#8212;<\/td>\n    <td class=\"avoid\">Lithium disilicate<\/td>\n  <\/tr>\n  <tr>\n    <td>Masking discoloration<\/td>\n    <td class=\"rec\">Zirconia<\/td>\n    <td>Lithium disilicate (limited cases)<\/td>\n    <td class=\"avoid\">Lithium disilicate (severe discoloration)<\/td>\n  <\/tr>\n<\/tbody>\n <\/table>\n  <\/div>\n  <p>The JADA consensus statement: &#8220;For three-unit restorations involving a molar, expert consensus suggests that only zirconia-based systems are indicated.&#8221;<sup><a href=\"#ref-17\">[17]<\/a><\/sup><\/p>\n\n  <h2 id=\"os_sec_thickness\">9. Preparation design and minimum thickness<\/h2>\n  <p>Full-strength 3Y zirconia needs only 0.5 mm occlusal clearance. That is half of what lithium disilicate requires for adhesive bonding (1.0 mm) and a third of what conventional cementation requires (1.5&ndash;2.0 mm).<sup><a href=\"#ref-1\">[1]<\/a><\/sup><sup><a href=\"#ref-21\">[21]<\/a><\/sup><\/p>\n\n  <h3>Lithium disilicate minimum thicknesses<\/h3>\n  <div class=\"os_blog_table_wrap\">\n    <table class=\"os_blog_table\">\n      <thead><tr><th>Parameter<\/th><th>Adhesive Bonding<\/th><th>Conventional Cementation<\/th><\/tr><\/thead>\n      <tbody>\n        <tr><td>Occlusal\/incisal<\/td><td>1.0 mm<\/td><td>1.5&ndash;2.0 mm<\/td><\/tr>\n        <tr><td>Axial walls<\/td><td>1.0 mm<\/td><td>1.0&ndash;1.5 mm<\/td><\/tr>\n        <tr><td>Veneers<\/td><td>0.4 mm (adhesive mandatory)<\/td><td>N\/A<\/td><\/tr>\n        <tr><td>Inlays\/onlays<\/td><td>1.0 mm<\/td><td>1.5 mm<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <h3>Zirconia minimum thicknesses<\/h3>\n  <div class=\"os_blog_table_wrap\">\n    <table class=\"os_blog_table\">\n      <thead><tr><th>Parameter<\/th><th>Full-Strength (3Y)<\/th><th>Esthetic\/HT (4Y-5Y)<\/th><\/tr><\/thead>\n      <tbody>\n        <tr><td>Occlusal (minimum)<\/td><td>0.5 mm<\/td><td>0.7 mm<\/td><\/tr>\n        <tr><td>Occlusal (ideal)<\/td><td>1.0 mm<\/td><td>1.25 mm<\/td><\/tr>\n        <tr><td>Axial walls<\/td><td>0.5 mm<\/td><td>0.7 mm<\/td><\/tr>\n        <tr><td>Margin<\/td><td>0.5 mm<\/td><td>0.5 mm<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n  <p>Less reduction means more preserved tooth structure. For compromised teeth with limited remaining structure, zirconia&#8217;s thinner requirements can be the difference between a viable restoration and an extraction.<sup><a href=\"#ref-1\">[1]<\/a><\/sup><\/p>\n\n  <h3>Margin design<\/h3>\n  <p><strong>Lithium disilicate:<\/strong> Circular shoulder with rounded inner edges or chamfer at 10&ndash;30&deg;. Minimum width of 1.0 mm.<sup><a href=\"#ref-21\">[21]<\/a><\/sup><\/p>\n  <p><strong>Zirconia:<\/strong> Chamfer preferred (0.3&ndash;0.5 mm minimum). Feather-edge is acceptable for monolithic designs. Avoid 90&deg; shoulders.<sup><a href=\"#ref-1\">[1]<\/a><\/sup><\/p>\n\n  <h2 id=\"os_sec_cementation\">10. Cementation protocols<\/h2>\n  <p>The protocols for these two materials are different, and mixing them up causes real problems.<sup><a href=\"#ref-18\">[18]<\/a><\/sup><sup><a href=\"#ref-28\">[28]<\/a><\/sup><sup><a href=\"#ref-29\">[29]<\/a><\/sup><\/p>\n\n  <div class=\"os_blog_cementation\">\n    <div class=\"os_blog_cem_col ld\">\n      <h4>Lithium disilicate (adhesive)<\/h4>\n      <ol>\n        <li>Etch intaglio with 5% HF acid, 20 seconds<\/li>\n        <li>Rinse thoroughly and dry<\/li>\n        <li>Apply silane (e.g., Monobond Plus), 60-second dwell, air-dry<\/li>\n        <li>Prepare tooth with total-etch or self-etch adhesive<\/li>\n        <li>Seat with resin cement (light or dual-cure)<\/li>\n        <li>Tack-cure 1&ndash;3 sec, remove excess, final cure<\/li>\n        <li>Glycerin gel at margins before final cure<\/li>\n      <\/ol>\n    <\/div>\n    <div class=\"os_blog_cem_col zr\">\n      <h4>Zirconia (conventional\/adhesive)<\/h4>\n      <ol>\n        <li>Sandblast: 50 &mu;m Al&#8322;O&#8323;, 1.5&ndash;2.0 bar, 10&ndash;15 sec<\/li>\n        <li>Clean with Ivoclean or ZirClean<\/li>\n        <li>For adhesive: MDP-containing primer (Z-Prime Plus, Monobond Plus, Clearfil Ceramic Primer)<\/li>\n        <li>Cement: RMGI, self-adhesive resin, or resin cement<\/li>\n      <\/ol>\n    <\/div>\n  <\/div>\n\n  <div class=\"os_blog_warning\">\n    <strong>Never sandblast lithium disilicate.<\/strong> Alumina impact creates subsurface flaws in the glass matrix. Use HF etching only.<sup><a href=\"#ref-18\">[18]<\/a><\/sup><sup><a href=\"#ref-28\">[28]<\/a><\/sup>\n  <\/div>\n  <div class=\"os_blog_warning\">\n    <strong>Never use HF acid on zirconia.<\/strong> No glass phase to etch. Silane alone is also insufficient (no silica).<sup><a href=\"#ref-18\">[18]<\/a><\/sup><sup><a href=\"#ref-28\">[28]<\/a><\/sup><sup><a href=\"#ref-29\">[29]<\/a><\/sup>\n  <\/div>\n\n  <h3>When is adhesive bonding mandatory?<\/h3>\n  <div class=\"os_blog_table_wrap\">\n    <table class=\"os_blog_table\">\n      <thead><tr><th>Scenario<\/th><th>Lithium Disilicate<\/th><th>Zirconia<\/th><\/tr><\/thead>\n      <tbody>\n        <tr><td>Adequate retention geometry<\/td><td>Adhesive preferred; conventional acceptable<\/td><td>Conventional (GIC, RMGI, self-adhesive resin)<\/td><\/tr>\n        <tr><td>Short or tapered preparation<\/td><td>Adhesive mandatory<\/td><td>Adhesive (sandblast + MDP + resin)<\/td><\/tr>\n        <tr><td>Veneers, inlays, onlays<\/td><td>Adhesive mandatory<\/td><td>Rarely applicable<\/td><\/tr>\n        <tr><td>Thin restoration (&lt;1.5 mm)<\/td><td>Adhesive mandatory<\/td><td>Conventional usually acceptable<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n<\/div>\n<!-- BLOCK 6 END -->\n\n\n<!-- ============================================================\n  BLOCK 7: OPPOSING TOOTH WEAR + NEW DEVELOPMENTS\n  Paste everything between the START and END markers into\n  a WordPress \"Custom HTML\" block.\n============================================================ -->\n<!-- BLOCK 7 START -->\n<style>\n.os_blog_s7 {\n  font-family: \"Roboto\", sans-serif;\n  max-width: 900px;\n  margin: 0 auto;\n  padding: 0 20px;\n  color: #3f3f3f;\n  line-height: 1.8;\n}\n.os_blog_s7 h2 { font-size: 26px; font-weight: 700; color: #1260a0; margin: 40px 0 16px; padding-bottom: 8px; border-bottom: 2px solid #e2e6ea; }\n.os_blog_s7 h3 { font-size: 20px; font-weight: 600; color: #3f3f3f; margin: 30px 0 12px; }\n.os_blog_s7 p { font-size: 16px; color: #606060; margin-bottom: 16px; }\n.os_blog_s7 ul { padding-left: 24px; margin-bottom: 16px; }\n.os_blog_s7 li { font-size: 15px; color: #606060; margin-bottom: 6px; }\n.os_blog_s7 sup a { color: #1260a0; text-decoration: none; font-size: 11px; }\n.os_blog_highlight_box {\n  background: #e8f5e9;\n  border-left: 4px solid #27ae60;\n  padding: 14px 18px;\n  margin: 16px 0;\n  font-size: 14px;\n  color: #2c3e50;\n  border-radius: 0 6px 6px 0;\n  line-height: 1.6;\n}\n.os_blog_chart_wrap { background: #fff; border-radius: 12px; padding: 24px; margin: 24px 0 30px; box-shadow: 0 2px 12px rgba(0,0,0,0.06); border: 1px solid #e2e6ea; }\n.os_blog_chart_wrap h4 { text-align: center; font-size: 16px; font-weight: 600; color: #3f3f3f; margin-bottom: 16px; }\n.os_blog_chart_container { position: relative; width: 100%; max-width: 850px; margin: 0 auto; }\n.os_blog_chart_source { text-align: center; font-size: 12px; color: #999; margin-top: 12px; }\n<\/style>\n\n<div class=\"os_blog_s7\">\n  <h2 id=\"os_sec_wear\">11. Opposing tooth wear<\/h2>\n  <p>A common concern about zirconia is that it wears down opposing natural teeth. The data does not support this.<sup><a href=\"#ref-7\">[7]<\/a><\/sup><sup><a href=\"#ref-15\">[15]<\/a><\/sup><\/p>\n\n  <h3>In vitro data<\/h3>\n  <p>Lawson et al. (2014) measured opposing enamel wear volumes for polished materials<sup><a href=\"#ref-7\">[7]<\/a><\/sup>:<\/p>\n  <ul>\n    <li>Polished zirconia: 0.33 mm&sup3;<\/li>\n    <li>Polished lithium disilicate: 0.36 mm&sup3;<\/li>\n    <li>Enamel vs enamel (control): comparable<\/li>\n    <li>Veneering porcelain: 2.15 mm&sup3;, six times more than either material<\/li>\n  <\/ul>\n\n  <h3>In vivo data<\/h3>\n  <p>A one-year clinical study using 3D quantitative analysis found no statistically significant difference (P &gt; 0.05) in opposing enamel wear between zirconia (40.27 &mu;m), lithium disilicate (47.81 &mu;m), and natural enamel controls (39.11 &mu;m).<sup><a href=\"#ref-15\">[15]<\/a><\/sup><\/p>\n\n  <div class=\"os_blog_chart_wrap\">\n    <h4>Opposing enamel wear: polished materials vs veneering porcelain (mm&sup3;)<\/h4>\n    <div class=\"os_blog_chart_container\">\n      <canvas id=\"os_chart_wear\" height=\"240\"><\/canvas>\n    <\/div>\n    <noscript>\n      <table style=\"width:100%;border-collapse:collapse;font-size:14px;\">\n        <tr><th style=\"text-align:left;padding:6px;border-bottom:1px solid #ddd;\">Material<\/th><th style=\"text-align:right;padding:6px;\">mm&sup3;<\/th><\/tr>\n        <tr><td style=\"padding:6px;\">Polished zirconia<\/td><td style=\"text-align:right;\">0.33<\/td><\/tr>\n        <tr><td style=\"padding:6px;\">Polished LS2<\/td><td style=\"text-align:right;\">0.36<\/td><\/tr>\n        <tr><td style=\"padding:6px;\">Enamel vs enamel<\/td><td style=\"text-align:right;\">0.35<\/td><\/tr>\n        <tr><td style=\"padding:6px;\">Veneering porcelain<\/td><td style=\"text-align:right;\">2.15<\/td><\/tr>\n      <\/table>\n    <\/noscript>\n    <div class=\"os_blog_chart_source\">Source: Lawson et al. 2014 [7]<\/div>\n  <\/div>\n\n  <h3>Where the wear comes from<\/h3>\n  <p>The wear problem with ceramics is about surface finish, not the material. Glazed porcelain and rough ceramic surfaces are abrasive to opposing enamel. When you adjust a restoration chairside, the original glaze layer comes off. If you do not re-polish, the rough surface accelerates opposing tooth wear.<sup><a href=\"#ref-7\">[7]<\/a><\/sup><\/p>\n  <div class=\"os_blog_highlight_box\">\n    Always polish after any chairside occlusal adjustment. The 30&ndash;50 &mu;m glaze layer wears off quickly in function. The underlying polished ceramic surface is what contacts opposing teeth long-term.\n  <\/div>\n\n  <h2 id=\"os_sec_new\">12. New developments (2024&ndash;2026)<\/h2>\n\n  <h3>Multilayer zirconia goes mainstream<\/h3>\n  <p>Multilayer gradient zirconia has become standard over the past two years.<sup><a href=\"#ref-12\">[12]<\/a><\/sup><sup><a href=\"#ref-22\">[22]<\/a><\/sup> These discs transition from high-strength 3Y-TZP in the cervical\/dentin layers to translucent 5Y-TZP at the incisal edge, mimicking the natural tooth&#8217;s own gradient from opacity to translucency.<\/p>\n  <p>Ivoclar&#8217;s IPS e.max ZirCAD Prime (3Y-to-5Y gradient, 1,100 MPa, 15-minute speed sintering)<sup><a href=\"#ref-22\">[22]<\/a><\/sup> is one of many products now offering this architecture, with competitors providing 9 to 15-layer gradient options.<\/p>\n\n  <h3>Advanced lithium disilicate<\/h3>\n  <p>CEREC Tessera (Dentsply Sirona) uses a virgilite-reinforced, zirconia-enriched glass matrix to reach flexural strength exceeding 700 MPa, roughly 32% stronger than standard lithium disilicate, with a 4.5-minute speed firing cycle.<sup><a href=\"#ref-26\">[26]<\/a><\/sup> At that strength level, Tessera sits in the same range as some 5Y zirconia products.<\/p>\n\n  <h3>Speed sintering<\/h3>\n  <p>Single-visit ceramic restorations are increasingly practical. IPS e.max ZirCAD Prime sinters in 15 minutes without predrying or strength loss.<sup><a href=\"#ref-22\">[22]<\/a><\/sup> IPS e.max CAD crystallizes in under 12 minutes.<sup><a href=\"#ref-21\">[21]<\/a><\/sup> CEREC Tessera fires in 4.5 minutes.<sup><a href=\"#ref-26\">[26]<\/a><\/sup><\/p>\n\n  <h3>Market trajectory<\/h3>\n  <p>Zirconia is outpacing lithium disilicate in market growth. The U.S. zirconia dental materials market reached $122.3 million in 2024, growing at 7.1% CAGR through 2030. CAD\/CAM-ready zirconia accounts for 84% of lab workflows, and clinical adoption in fixed restorations exceeds 71%.<\/p>\n  <p>Lithium disilicate remains the go-to material for adhesively bonded, minimally invasive restorations like veneers, inlays, and onlays. Its etchable glass matrix provides a bonding advantage that zirconia cannot match.<sup><a href=\"#ref-16\">[16]<\/a><\/sup><\/p>\n<\/div>\n\n<script>\n(function(){\n  var ctx = document.getElementById('os_chart_wear');\n  if(!ctx) return;\n  new Chart(ctx, {\n    type: 'bar',\n    data: {\n      labels: ['Polished\\nzirconia','Polished\\nLS\u2082','Enamel vs\\nenamel','Veneering\\nporcelain'],\n      datasets: [{\n        label: 'Opposing enamel wear (mm\u00b3)',\n        data: [0.33, 0.36, 0.35, 2.15],\n        backgroundColor: ['#1260a0','#27ae60','#95a5a6','#c0392b'],\n        borderRadius: 4\n      }]\n    },\n    options: {\n      responsive: true,\n      maintainAspectRatio: false,\n      plugins: {\n        legend: { display: false },\n        tooltip: {\n          callbacks: {\n            label: function(c){ return c.raw + ' mm\u00b3'; }\n          }\n        }\n      },\n      scales: {\n        y: {\n          beginAtZero: true,\n          max: 2.5,\n          title: { display: true, text: 'Opposing Enamel Wear (mm\u00b3)', font: { size: 13 } },\n          grid: { color: 'rgba(0,0,0,0.06)' }\n        },\n        x: { grid: { display: false }, ticks: { font: { size: 12 } } }\n      }\n    }\n  });\n})();\n<\/script>\n<!-- BLOCK 7 END -->\n\n\n<!-- ============================================================\n  BLOCK 8: OWNSMILE PRODUCTS + MYTHS VS FACTS\n  Paste everything between the START and END markers into\n  a WordPress \"Custom HTML\" block.\n============================================================ -->\n<!-- BLOCK 8 START -->\n<style>\n.os_blog_s8 {\n  font-family: \"Roboto\", sans-serif;\n  max-width: 900px;\n  margin: 0 auto;\n  padding: 0 20px;\n  color: #3f3f3f;\n  line-height: 1.8;\n}\n.os_blog_s8 h2 { font-size: 26px; font-weight: 700; color: #1260a0; margin: 40px 0 16px; padding-bottom: 8px; border-bottom: 2px solid #e2e6ea; }\n.os_blog_s8 p { font-size: 16px; color: #606060; margin-bottom: 16px; }\n.os_blog_s8 sup a { color: #1260a0; text-decoration: none; font-size: 11px; }\n.os_blog_product_table {\n  width: 100%;\n  border-collapse: collapse;\n  font-size: 14px;\n  margin: 16px 0 24px;\n  min-width: 650px;\n}\n.os_blog_product_table thead th {\n  background: linear-gradient(135deg, #1260a0, #107ec2);\n  color: #fff;\n  padding: 12px 14px;\n  text-align: left;\n  font-weight: 600;\n}\n.os_blog_product_table tbody td {\n  padding: 10px 14px;\n  border-bottom: 1px solid #eee;\n  color: #606060;\n}\n.os_blog_product_table tbody tr:nth-child(even) { background: #f8fafb; }\n.os_blog_product_table tbody tr:hover { background: #f0f7fc; }\n.os_blog_product_link {\n  display: inline-block;\n  margin-top: 12px;\n  background: #fff;\n  color: #1260a0;\n  padding: 10px 24px;\n  border-radius: 6px;\n  text-decoration: none;\n  font-size: 14px;\n  font-weight: 600;\n  border: 2px solid #1260a0;\n  transition: background 0.2s, color 0.2s;\n}\n.os_blog_product_link:hover { background: #f0f7fc; color: #0d4e80; border-color: #0d4e80; }\n.os_blog_myth_card {\n  background: #fff;\n  border-radius: 8px;\n  border: 1px solid #e2e6ea;\n  padding: 20px;\n  margin-bottom: 16px;\n}\n.os_blog_myth_label {\n  font-size: 13px;\n  font-weight: 700;\n  color: #c0392b;\n  text-transform: uppercase;\n  letter-spacing: 0.04em;\n  margin-bottom: 4px;\n}\n.os_blog_myth_text {\n  font-size: 15px;\n  color: #3f3f3f;\n  font-style: italic;\n  margin-bottom: 10px;\n}\n.os_blog_fact_label {\n  font-size: 13px;\n  font-weight: 700;\n  color: #27ae60;\n  text-transform: uppercase;\n  letter-spacing: 0.04em;\n  margin-bottom: 4px;\n}\n.os_blog_fact_text {\n  font-size: 15px;\n  color: #606060;\n  line-height: 1.6;\n}\n.os_blog_table_wrap { overflow-x: auto; margin: 16px 0 28px; border-radius: 8px; border: 1px solid #e2e6ea; }\n<\/style>\n\n<div class=\"os_blog_s8\">\n  <h2 id=\"os_sec_products\">13. Ownsmile zirconia: matching products to clinical needs<\/h2>\n  <p>The zirconia generation framework in this article maps directly to the Ownsmile product lineup. Each product line corresponds to a clinical niche defined by its yttria content, strength, and translucency.<\/p>\n\n  <div class=\"os_blog_table_wrap\">\n    <table class=\"os_blog_product_table\">\n      <thead>\n        <tr><th>Ownsmile Product<\/th><th>Zirconia Type<\/th><th>Strength (MPa)<\/th><th>Translucency<\/th><th>Clinical Application<\/th><\/tr>\n      <\/thead>\n      <tbody>\n  <tr><td>UT-ML<\/td><td>5Y-TZP<\/td><td>800<\/td><td>60%<\/td><td>Anterior crowns, high-esthetic cases<\/td><\/tr>\n  <tr><td>3D-Pro-ML<\/td><td>Gradient 3Y&rarr;5Y<\/td><td>800&ndash;1,200<\/td><td>42&ndash;49%<\/td><td>Universal use, natural tooth mimicry<\/td><\/tr>\n  <tr><td>SHT White \/ SHT-C \/ SHT-ML<\/td><td>4Y<\/td><td>900&ndash;1,000<\/td><td>45&ndash;46%<\/td><td>Anterior crowns, esthetic posteriors<\/td><\/tr>\n  <tr><td>ST White \/ ST-C \/ ST-ML<\/td><td>3Y-4Y<\/td><td>1,100&ndash;1,200<\/td><td>42&ndash;43%<\/td><td>Anterior and posterior crowns, bridges<\/td><\/tr>\n  <tr><td>HT White \/ HT-C Pre-shaded<\/td><td>3Y-TZP<\/td><td>1,350<\/td><td>40%<\/td><td>Posterior crowns, bridges, bruxism cases<\/td><\/tr>\n<\/tbody>\n    <\/table>\n  <\/div>\n\n  <a href=\"https:\/\/www.own-smile.com\/products\/zirconia-block\/\" class=\"os_blog_product_link\" target=\"_blank\" rel=\"noopener\">View the full Ownsmile zirconia collection &rarr;<\/a>\n\n  <h2 id=\"os_sec_myths\" style=\"margin-top:50px;\">14. Myths vs facts<\/h2>\n\n  <div class=\"os_blog_myth_card\">\n    <div class=\"os_blog_myth_label\">Myth 1<\/div>\n    <div class=\"os_blog_myth_text\">&#8220;Zirconia is a metal.&#8221;<\/div>\n    <div class=\"os_blog_fact_label\">Fact<\/div>\n    <div class=\"os_blog_fact_text\">Zirconia (ZrO<sub>2<\/sub>) is a polycrystalline ceramic, not a metal. Zirconium is the metallic element; zirconia is its oxide. The distinction is similar to aluminum (metal) vs aluminum oxide\/alumina (ceramic).<sup><a href=\"#ref-1\">[1]<\/a><\/sup><sup><a href=\"#ref-19\">[19]<\/a><\/sup><\/div>\n  <\/div>\n\n  <div class=\"os_blog_myth_card\">\n    <div class=\"os_blog_myth_label\">Myth 2<\/div>\n    <div class=\"os_blog_myth_text\">&#8220;Zirconia always wears down opposing teeth.&#8221;<\/div>\n    <div class=\"os_blog_fact_label\">Fact<\/div>\n    <div class=\"os_blog_fact_text\">Polished monolithic zirconia causes less opposing enamel wear than porcelain veneering material. In vitro: polished zirconia wear is 0.33 mm&sup3;, comparable to enamel on enamel. Veneering porcelain causes six times more at 2.15 mm&sup3;.<sup><a href=\"#ref-7\">[7]<\/a><\/sup><sup><a href=\"#ref-15\">[15]<\/a><\/sup><\/div>\n  <\/div>\n\n  <div class=\"os_blog_myth_card\">\n    <div class=\"os_blog_myth_label\">Myth 3<\/div>\n    <div class=\"os_blog_myth_text\">&#8220;Lithium disilicate is too weak for posterior teeth.&#8221;<\/div>\n    <div class=\"os_blog_fact_label\">Fact<\/div>\n    <div class=\"os_blog_fact_text\">Monolithic lithium disilicate at 360&ndash;530 MPa has sufficient flexural strength for single posterior crowns in non-bruxism patients when adhesively bonded. Five-year survival exceeds 96%. It should be avoided for second molars, molar-extending bridges, and bruxism patients.<sup><a href=\"#ref-4\">[4]<\/a><\/sup><sup><a href=\"#ref-6\">[6]<\/a><\/sup><sup><a href=\"#ref-17\">[17]<\/a><\/sup><\/div>\n  <\/div>\n\n  <div class=\"os_blog_myth_card\">\n    <div class=\"os_blog_myth_label\">Myth 4<\/div>\n    <div class=\"os_blog_myth_text\">&#8220;Newer translucent zirconia has the same strength as traditional zirconia.&#8221;<\/div>\n    <div class=\"os_blog_fact_label\">Fact<\/div>\n    <div class=\"os_blog_fact_text\">Ultra-translucent 5Y-TZP (500&ndash;800 MPa) is 40&ndash;50% weaker than full-strength 3Y-TZP (1,000&ndash;1,500 MPa). The improved translucency comes at a real mechanical cost because adding yttria eliminates the transformation toughening mechanism.<sup><a href=\"#ref-3\">[3]<\/a><\/sup><sup><a href=\"#ref-12\">[12]<\/a><\/sup><sup><a href=\"#ref-14\">[14]<\/a><\/sup><\/div>\n  <\/div>\n\n  <div class=\"os_blog_myth_card\">\n    <div class=\"os_blog_myth_label\">Myth 5<\/div>\n    <div class=\"os_blog_myth_text\">&#8220;All zirconia is the same.&#8221;<\/div>\n    <div class=\"os_blog_fact_label\">Fact<\/div>\n    <div class=\"os_blog_fact_text\">3Y, 4Y, and 5Y zirconia have different strength profiles, translucency levels, and clinical indications. Ordering &#8220;zirconia&#8221; without specifying the generation is like prescribing &#8220;antibiotics&#8221; without specifying the drug.<sup><a href=\"#ref-12\">[12]<\/a><\/sup><sup><a href=\"#ref-14\">[14]<\/a><\/sup><\/div>\n  <\/div>\n<\/div>\n<!-- BLOCK 8 END -->\n\n\n<!-- ============================================================\n  BLOCK 9: FAQ ACCORDION\n  Paste everything between the START and END markers into\n  a WordPress \"Custom HTML\" block.\n============================================================ -->\n<!-- BLOCK 9 START -->\n<style>\n.os_blog_faq {\n  font-family: \"Roboto\", sans-serif;\n  max-width: 900px;\n  margin: 0 auto;\n  padding: 0 20px;\n}\n.os_blog_faq h2 { font-size: 26px; font-weight: 700; color: #1260a0; margin: 40px 0 20px; padding-bottom: 8px; border-bottom: 2px solid #e2e6ea; }\n.os_blog_faq_item {\n  border: 1px solid #e2e6ea;\n  border-radius: 8px;\n  margin-bottom: 10px;\n  overflow: hidden;\n}\n.os_blog_faq_q {\n  background: #fff;\n  padding: 16px 20px;\n  cursor: pointer;\n  display: flex;\n  align-items: center;\n  justify-content: space-between;\n  font-size: 15px;\n  font-weight: 600;\n  color: #3f3f3f;\n  transition: background 0.2s;\n}\n.os_blog_faq_q:hover { background: #f8fafb; }\n.os_blog_faq_q .faq_arrow {\n  font-size: 18px;\n  color: #1260a0;\n  transition: transform 0.3s;\n  flex-shrink: 0;\n  margin-left: 12px;\n}\n.os_blog_faq_item.open .faq_arrow {\n  transform: rotate(180deg);\n}\n.os_blog_faq_a {\n  max-height: 0;\n  overflow: hidden;\n  transition: max-height 0.35s ease, padding 0.35s ease;\n  padding: 0 20px;\n  background: #f8fafb;\n}\n.os_blog_faq_item.open .os_blog_faq_a {\n  max-height: 500px;\n  padding: 16px 20px;\n}\n.os_blog_faq_a p {\n  font-size: 15px;\n  color: #606060;\n  line-height: 1.7;\n  margin: 0;\n}\n.os_blog_faq_a sup a { color: #1260a0; text-decoration: none; font-size: 11px; }\n<\/style>\n\n<div class=\"os_blog_faq\">\n  <h2 id=\"os_sec_faq\">15. Frequently asked questions<\/h2>\n\n  <div class=\"os_blog_faq_item\">\n    <div class=\"os_blog_faq_q\">Which material is better for posterior molar restorations?<span class=\"faq_arrow\">&#9660;<\/span><\/div>\n    <div class=\"os_blog_faq_a\"><p>For high-stress posterior molars, monolithic 3Y-TZP zirconia is the first choice. It offers 1,000&ndash;1,500 MPa flexural strength and a 1.4% chipping rate.<sup><a href=\"#ref-3\">[3]<\/a><\/sup><sup><a href=\"#ref-11\">[11]<\/a><\/sup> Lithium disilicate works for premolars in non-bruxism patients when adhesively bonded.<sup><a href=\"#ref-4\">[4]<\/a><\/sup><sup><a href=\"#ref-6\">[6]<\/a><\/sup><\/p><\/div>\n  <\/div>\n\n  <div class=\"os_blog_faq_item\">\n    <div class=\"os_blog_faq_q\">Can zirconia be used for veneers?<span class=\"faq_arrow\">&#9660;<\/span><\/div>\n    <div class=\"os_blog_faq_a\"><p>Ultra-translucent 5Y zirconia can technically be used, but lithium disilicate is strongly preferred. Lithium disilicate&#8217;s etchable glass matrix provides reliable adhesive bonding, which is essential for veneers. Zirconia cannot be etched with HF acid and depends on mechanical retention and MDP primers.<sup><a href=\"#ref-1\">[1]<\/a><\/sup><sup><a href=\"#ref-18\">[18]<\/a><\/sup><\/p><\/div>\n  <\/div>\n\n  <div class=\"os_blog_faq_item\">\n    <div class=\"os_blog_faq_q\">Does zirconia wear down opposing teeth?<span class=\"faq_arrow\">&#9660;<\/span><\/div>\n    <div class=\"os_blog_faq_a\"><p>No. Polished monolithic zirconia causes opposing enamel wear comparable to natural enamel on enamel contact. The problem comes from rough, unpolished ceramic surfaces. Always polish after chairside adjustments.<sup><a href=\"#ref-7\">[7]<\/a><\/sup><sup><a href=\"#ref-15\">[15]<\/a><\/sup><\/p><\/div>\n  <\/div>\n\n  <div class=\"os_blog_faq_item\">\n    <div class=\"os_blog_faq_q\">What cement should I use for zirconia vs lithium disilicate?<span class=\"faq_arrow\">&#9660;<\/span><\/div>\n    <div class=\"os_blog_faq_a\"><p>Lithium disilicate: etch with 5% HF acid, silane, then resin cement. Zirconia: sandblast with 50 &mu;m alumina, apply MDP-containing primer, then conventional or adhesive cement. Do not cross these protocols.<sup><a href=\"#ref-18\">[18]<\/a><\/sup><sup><a href=\"#ref-28\">[28]<\/a><\/sup><sup><a href=\"#ref-29\">[29]<\/a><\/sup><\/p><\/div>\n  <\/div>\n\n  <div class=\"os_blog_faq_item\">\n    <div class=\"os_blog_faq_q\">Is lithium disilicate strong enough for bridges?<span class=\"faq_arrow\">&#9660;<\/span><\/div>\n    <div class=\"os_blog_faq_a\"><p>For 3-unit bridges with premolar terminals only. It is contraindicated for bridges extending to molars and for any bridge longer than 3 units. Ten-year survival for lithium disilicate bridges drops to 70.9%.<sup><a href=\"#ref-6\">[6]<\/a><\/sup> The ADA recommends zirconia for molar-involving bridges.<sup><a href=\"#ref-17\">[17]<\/a><\/sup><\/p><\/div>\n  <\/div>\n\n  <div class=\"os_blog_faq_item\">\n    <div class=\"os_blog_faq_q\">What is the difference between 3Y, 4Y, and 5Y zirconia?<span class=\"faq_arrow\">&#9660;<\/span><\/div>\n    <div class=\"os_blog_faq_a\"><p>The number indicates the mol% of yttria stabilizer. 3Y has the highest strength (1,000&ndash;1,500 MPa) and lowest translucency. 5Y has the highest translucency and lowest strength (500&ndash;800 MPa). 4Y falls in between.<sup><a href=\"#ref-12\">[12]<\/a><\/sup><sup><a href=\"#ref-14\">[14]<\/a><\/sup><\/p><\/div>\n  <\/div>\n\n  <div class=\"os_blog_faq_item\">\n    <div class=\"os_blog_faq_q\">How long do zirconia and lithium disilicate crowns last?<span class=\"faq_arrow\">&#9660;<\/span><\/div>\n    <div class=\"os_blog_faq_a\"><p>Both show strong longevity for single crowns. Lithium disilicate: 96.6&ndash;97.8% survival at 5 years, up to 96.7% at 10 years.<sup><a href=\"#ref-4\">[4]<\/a><\/sup><sup><a href=\"#ref-6\">[6]<\/a><\/sup> Monolithic zirconia: 94&ndash;98% at 5 years.<sup><a href=\"#ref-4\">[4]<\/a><\/sup><sup><a href=\"#ref-11\">[11]<\/a><\/sup> The difference is not statistically significant for single crowns.<sup><a href=\"#ref-9\">[9]<\/a><\/sup><\/p><\/div>\n  <\/div>\n\n  <div class=\"os_blog_faq_item\">\n    <div class=\"os_blog_faq_q\">Can I adjust zirconia chairside?<span class=\"faq_arrow\">&#9660;<\/span><\/div>\n    <div class=\"os_blog_faq_a\"><p>Yes, but polish thoroughly afterward. Use diamond burs designed for zirconia at moderate speed with water cooling. After contouring, polish sequentially with rubber points or diamond-impregnated polishers. Leaving the surface unpolished increases opposing enamel wear.<sup><a href=\"#ref-7\">[7]<\/a><\/sup><\/p><\/div>\n  <\/div>\n<\/div>\n\n<script>\n(function(){\n  document.querySelectorAll('.os_blog_faq_q').forEach(function(btn){\n    btn.addEventListener('click', function(){\n      var item = this.parentElement;\n      var wasOpen = item.classList.contains('open');\n      document.querySelectorAll('.os_blog_faq_item').forEach(function(el){ el.classList.remove('open'); });\n      if(!wasOpen) item.classList.add('open');\n    });\n  });\n})();\n<\/script>\n<!-- BLOCK 9 END -->\n\n\n<!-- ============================================================\n  BLOCK 10: CONCLUSION + REFERENCES + AUTHOR BIO + DISCLAIMERS\n  Paste everything between the START and END markers into\n  a WordPress \"Custom HTML\" block.\n============================================================ -->\n<!-- BLOCK 10 START -->\n<style>\n.os_blog_s10 {\n  font-family: \"Roboto\", sans-serif;\n  max-width: 900px;\n  margin: 0 auto;\n  padding: 0 20px;\n  color: #3f3f3f;\n  line-height: 1.8;\n}\n.os_blog_s10 h2 { font-size: 26px; font-weight: 700; color: #1260a0; margin: 40px 0 16px; padding-bottom: 8px; border-bottom: 2px solid #e2e6ea; }\n.os_blog_s10 p { font-size: 16px; color: #606060; margin-bottom: 16px; }\n.os_blog_refs_list {\n  list-style-type: decimal;\n  padding-left: 24px;\n  margin: 16px 0 30px;\n}\n.os_blog_refs_list li {\n  font-size: 13px;\n  color: #606060;\n  margin-bottom: 8px;\n  line-height: 1.5;\n  padding-left: 4px;\n}\n.os_blog_refs_list li em { color: #888; }\n.os_blog_author_box {\n  display: flex;\n  gap: 20px;\n  align-items: center;\n  background: #f8fafb;\n  border-radius: 12px;\n  padding: 24px;\n  margin: 30px 0;\n  border: 1px solid #e2e6ea;\n}\n.os_blog_author_avatar {\n  width: 70px;\n  height: 70px;\n  border-radius: 50%;\n  background: linear-gradient(135deg, #1260a0, #107ec2);\n  display: flex;\n  align-items: center;\n  justify-content: center;\n  color: #fff;\n  font-weight: 700;\n  font-size: 24px;\n  flex-shrink: 0;\n}\n.os_blog_author_info h4 {\n  font-size: 16px;\n  font-weight: 700;\n  color: #3f3f3f;\n  margin-bottom: 4px;\n}\n.os_blog_author_info p {\n  font-size: 14px;\n  color: #606060;\n  margin-bottom: 8px;\n}\n.os_blog_author_info a {\n  color: #1260a0;\n  text-decoration: none;\n  font-size: 14px;\n  font-weight: 500;\n}\n.os_blog_author_info a:hover { text-decoration: underline; }\n.os_blog_disclaimer {\n  background: #f8f9fa;\n  border-top: 1px solid #e2e6ea;\n  padding: 20px;\n  margin-top: 30px;\n  font-size: 13px;\n  color: #888;\n  line-height: 1.6;\n  border-radius: 8px;\n}\n<\/style>\n\n<div class=\"os_blog_s10\">\n  <h2 id=\"os_sec_conclusion\">16. Conclusion<\/h2>\n  <p>Lithium disilicate and zirconia solve different problems. Pick the one that fits the case.<\/p>\n  <p>Lithium disilicate works best where aesthetics and bondability matter: anterior crowns, veneers, inlays, onlays. Its glass matrix delivers translucency and reliable adhesive bonding at thicknesses as thin as 0.4 mm.<\/p>\n  <p>Zirconia works best where mechanical demands are high: posterior molars, long-span bridges, bruxism patients, implant-supported restorations. Full-strength 3Y-TZP provides two to three times the flexural strength of lithium disilicate, and monolithic designs have brought chipping rates down to 1.4%.<\/p>\n  <p>The newer multilayer zirconia products, with gradient architectures transitioning from 3Y to 5Y, are making the choice less binary. Advanced lithium disilicate formulations exceeding 700 MPa are closing the gap from the other direction.<\/p>\n  <p>When in doubt, go back to the <a href=\"#os_sec_flowchart\" style=\"color:#1260a0;\">decision flowchart<\/a>. Match the clinical scenario to the material.<\/p>\n\n  <h2 id=\"os_sec_refs\">17. References<\/h2>\n  <ol class=\"os_blog_refs_list\">\n    <li id=\"ref-1\">Zarone F, Di Mauro MI, Ausiello P, Ruggiero G, Sorrentino R. Current status on lithium disilicate and zirconia: a narrative review. <em>BMC Oral Health<\/em>. 2019;19:134. PMID: 31272441.<\/li>\n    <li id=\"ref-2\">Silva NRFA et al. Prescribing a dental ceramic material: Zirconia vs lithium-disilicate. PMC3723107.<\/li>\n    <li id=\"ref-3\">Kwon SJ et al. Evaluation of translucency, Marten&#8217;s hardness, biaxial flexural strength and fracture toughness of 3Y-TZP, 4Y-TZP and 5Y-TZP materials. <em>J Prosthet Dent<\/em>. 2018. PMID: 29310875.<\/li>\n    <li id=\"ref-4\">Sailer I et al. All-ceramic or metal-ceramic tooth-supported fixed dental prostheses (FDPs)? A systematic review. <em>Dent Mater<\/em>. 2015;31:603-623. PMID: 25842099.<\/li>\n    <li id=\"ref-5\">Pjetursson BE et al. A systematic review of the survival and complication rates of implant-supported fixed dental prostheses. <em>Clin Oral Impl Res<\/em>. 2018;29(S16):199-214. PMID: 30328190.<\/li>\n    <li id=\"ref-6\">Pieger S, Salman A, Hedra AS. Clinical outcomes of lithium disilicate single crowns and partial fixed dental prostheses: A systematic review. <em>J Prosthet Dent<\/em>. 2014;112:22-30. PMID: 24674802.<\/li>\n    <li id=\"ref-7\">Lawson NC, Janyavula S, Syklawer S, McLaren EA, Burgess JO. Wear of enamel opposing zirconia and lithium disilicate after adjustment, polishing and glazing. <em>J Dent<\/em>. 2014;42(12):1586-1591. PMID: 25257823.<\/li>\n    <li id=\"ref-8\">Ferrini F et al. Marginal accuracy of zirconia and lithium disilicate crowns. <em>Materials<\/em>. 2023;16(6):2413. PMC10058296.<\/li>\n    <li id=\"ref-9\">Comparison of Long-Term Clinical Outcomes of Zirconia and Lithium Disilicate Prostheses. <em>Biomimetics<\/em>. 2025;10(11):740.<\/li>\n    <li id=\"ref-10\">Kim HK. Optical and mechanical properties of highly translucent zirconia. <em>Materials<\/em>. 2020;13(15):3395. PMC7435650.<\/li>\n    <li id=\"ref-11\">Benli M et al. Systematic review of CAD\/CAM crowns. <em>Primary Dental J<\/em>. 2022. PMID: 36533368.<\/li>\n    <li id=\"ref-12\">Cesar PF et al. Recent Advances in Dental Zirconia: 15 Years of Material and Processing Evolution. <em>Dental Materials<\/em>. 2024;40:824-836. PMC11098698.<\/li>\n    <li id=\"ref-13\">Elsaka SE, Elnaghy AM. Mechanical properties of zirconia reinforced lithium silicate glass-ceramic. <em>Dental Materials<\/em>. 2016.<\/li>\n    <li id=\"ref-14\">Jerman E, Lumkemann N, Eichberger M et al. Evaluation of translucency, Marten&#8217;s hardness, biaxial flexural strength and fracture toughness of 3Y-TZP, 4Y-TZP and 5Y-TZP materials. <em>Dental Materials<\/em>. 2021;37:212-222.<\/li>\n    <li id=\"ref-15\">3D quantitative analysis of natural antagonist enamel opposing CAD-CAM monolithic zirconia or lithium disilicate. PMC10917629.<\/li>\n    <li id=\"ref-16\">ADA Oral Health Topics. Materials for Indirect Restorations. American Dental Association.<\/li>\n    <li id=\"ref-17\">The clinical success of all-ceramic restorations. <em>JADA<\/em>. 2008;139(9 suppl):8S-13S.<\/li>\n    <li id=\"ref-18\">Cementing all-ceramic restorations. <em>JADA<\/em>. 2011;142(4 suppl):20S-24S.<\/li>\n    <li id=\"ref-19\">Cleveland Clinic. Dental Crowns: Types, Procedure &#038; Care. Last updated 04\/14\/2023.<\/li>\n    <li id=\"ref-20\">WebMD. Dental Crowns: Purpose, Procedure, Complications, Care.<\/li>\n    <li id=\"ref-21\">Ivoclar Vivadent. IPS e.max CAD Scientific Documentation.<\/li>\n    <li id=\"ref-22\">Ivoclar Vivadent. IPS e.max ZirCAD Prime Block Technical Documentation.<\/li>\n    <li id=\"ref-23\">Glidewell. BruxZir Full-Strength Solid Zirconia Technical Documentation.<\/li>\n    <li id=\"ref-24\">3M. Lava Esthetic and Chairside Zirconia Technical Product Profiles.<\/li>\n    <li id=\"ref-25\">Kuraray Noritake. Katana Zirconia Technical Guides.<\/li>\n    <li id=\"ref-26\">Dentsply Sirona. CEREC Tessera Product Documentation.<\/li>\n    <li id=\"ref-27\">Christensen GJ. Zirconia vs. lithium disilicate. <em>Dental Economics<\/em>. 2015 (reviewed 2023).<\/li>\n    <li id=\"ref-28\">Brady LA. Luting Lithium Disilicate and Zirconia. <em>CDEWorld<\/em>.<\/li>\n    <li id=\"ref-29\">Lawson NC, Ahmed R. Ceramic Restorations &mdash; Guidelines for Cementing or Bonding. <em>Dentistry Today<\/em>.<\/li>\n  <\/ol>\n\n  <div class=\"os_blog_author_box\">\n    <div class=\"os_blog_author_avatar\">AX<\/div>\n    <div class=\"os_blog_author_info\">\n      <h4>Amanda Xie<\/h4>\n      <p>Digital Marketing Manager at OwnSmile, based in Shenzhen, China. She covers dental materials and product selection for dental professionals.<\/p>\n      <a href=\"https:\/\/www.linkedin.com\/in\/amanda-xie-260964150\/\" target=\"_blank\" rel=\"noopener\">Connect on LinkedIn &rarr;<\/a>\n      <p style=\"margin-top:10px;font-size:13px;color:#888;\">Peer reviewed by <a href=\"https:\/\/www.linkedin.com\/in\/fiona-chiu-80aa68279\/\" target=\"_blank\" rel=\"noopener\">Fiona Chiu<\/a>, Account Manager, Ownsmile.<\/p>\n    <\/div>\n  <\/div>\n\n  <div class=\"os_blog_disclaimer\">\n    <strong>Disclaimer:<\/strong> This content is for informational purposes only and does not constitute professional dental advice, diagnosis, or treatment. Always consult a qualified dental professional for clinical decisions. Ownsmile manufactures zirconia blocks referenced in this article. All clinical data and recommendations are based on independently published peer-reviewed research.\n  <\/div>\n<\/div>\n<!-- BLOCK 10 END -->\n\n<!-- Schema.org JSON-LD is managed in RankMath > Schema > Add Schema > Custom Schema.\n     Source files: schema-article.json, schema-faq.json (not pasted into the post body). -->\n","protected":false},"excerpt":{"rendered":"<p>AX Written by Amanda Xie, Digital Marketing Manager, Ownsmile LinkedIn &middot; Peer reviewed by Fiona Chiu &middot; Last Updated: April 2026 Disclosure: Ownsmile manufactures zirconia blocks. This article provides educational information based on published peer-reviewed research. All clinical data is independently sourced and cited. Table of contents Introduction Quick-reference decision flowchart Understanding the materials The [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":85,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[38],"tags":[36],"projects":[40,39],"fairs_location":[],"class_list":["post-124","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-product-intro","tag-corporate"],"_links":{"self":[{"href":"https:\/\/www.own-smile.com\/es\/wp-json\/wp\/v2\/posts\/124","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.own-smile.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.own-smile.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.own-smile.com\/es\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.own-smile.com\/es\/wp-json\/wp\/v2\/comments?post=124"}],"version-history":[{"count":0,"href":"https:\/\/www.own-smile.com\/es\/wp-json\/wp\/v2\/posts\/124\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.own-smile.com\/es\/wp-json\/wp\/v2\/media\/85"}],"wp:attachment":[{"href":"https:\/\/www.own-smile.com\/es\/wp-json\/wp\/v2\/media?parent=124"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.own-smile.com\/es\/wp-json\/wp\/v2\/categories?post=124"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.own-smile.com\/es\/wp-json\/wp\/v2\/tags?post=124"},{"taxonomy":"projects","embeddable":true,"href":"https:\/\/www.own-smile.com\/es\/wp-json\/wp\/v2\/projects?post=124"},{"taxonomy":"fairs_location","embeddable":true,"href":"https:\/\/www.own-smile.com\/es\/wp-json\/wp\/v2\/fairs_location?post=124"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}