{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,29]],"date-time":"2026-10-29T20:23:14Z","timestamp":1793305394114,"version":"4.5.0"},"reference-count":45,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2024,9,26]],"date-time":"2024-09-26T00:00:00Z","timestamp":1727308800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000072","name":"National Institute of Dental and Craniofacial Research","doi-asserted-by":"publisher","award":["R01DE026279"],"award-info":[{"award-number":["R01DE026279"]}],"id":[{"id":"10.13039\/100000072","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000072","name":"National Institute of Dental and Craniofacial Research","doi-asserted-by":"publisher","award":["R01DE026772"],"award-info":[{"award-number":["R01DE026772"]}],"id":[{"id":"10.13039\/100000072","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000072","name":"National Institute of Dental and Craniofacial Research","doi-asserted-by":"publisher","award":["R01DE033545"],"award-info":[{"award-number":["R01DE033545"]}],"id":[{"id":"10.13039\/100000072","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J Esthet Restor Dent"],"published-print":{"date-parts":[[2025,2]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To characterize the composition, flexure resistance, and optical properties of a multilayer translucent zirconia in relation to its multi\u2010transition zones.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and Methods<\/jats:title>\n                    <jats:p>\n                      A multilayer zirconia (5Y\/4Y) and a conventional 3\u2009mol% yttria partially stabilized zirconia (3Y) were investigated. Bar\u2010shaped specimens were obtained from the enamel and dentin layers, and the vertical cross\u2010section of 5Y\/4Y (\n                      <jats:italic>N<\/jats:italic>\n                      \u2009=\u200910). A four\u2010point flexural (\n                      <jats:italic>\u03c3<\/jats:italic>\n                      <jats:sub>\n                        <jats:italic>f<\/jats:italic>\n                      <\/jats:sub>\n                      ) test was performed using a universal testing machine (1.0\u2009mm\/min). Plate\u2010shaped specimens (\n                      <jats:italic>N<\/jats:italic>\n                      \u2009=\u20096) were also produced from the enamel, transition 1, transition 2, and dentin layers. Translucency parameters (TP\n                      <jats:sub>ab<\/jats:sub>\n                      and TP\n                      <jats:sub>00<\/jats:sub>\n                      ) were determined using a dental spectrophotometer (\n                      <jats:italic>N<\/jats:italic>\n                      \u2009=\u20096). X\u2010ray fluorescence and X\u2010ray diffraction techniques were used to analyze elemental (\n                      <jats:italic>N<\/jats:italic>\n                      \u2009=\u20092) and phase compositions (\n                      <jats:italic>N<\/jats:italic>\n                      \u2009=\u20092), respectively. Data were analyzed using analysis of variance (ANOVA) and Tukey's test (\n                      <jats:italic>\u03b1<\/jats:italic>\n                      \u2009=\u20090.05).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The yttrium content and\n                      <jats:italic>\u03c3<\/jats:italic>\n                      <jats:sub>\n                        <jats:italic>f<\/jats:italic>\n                      <\/jats:sub>\n                      varied between layers of 5Y\/4Y. 3Y had the highest\n                      <jats:italic>\u03c3<\/jats:italic>\n                      <jats:sub>\n                        <jats:italic>f<\/jats:italic>\n                      <\/jats:sub>\n                      , followed by dentin. Enamel and cross\u2010section showed lower and statically similar\n                      <jats:italic>\u03c3<\/jats:italic>\n                      <jats:sub>\n                        <jats:italic>f<\/jats:italic>\n                      <\/jats:sub>\n                      . 3Y and dentin groups had similar but statistically lower TP\n                      <jats:sub>ab<\/jats:sub>\n                      and TP\n                      <jats:sub>00<\/jats:sub>\n                      than the enamel.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Different layers of multilayered zirconia have distinct compositions, which affect their mechanical and optical properties. The weak enamel layer compromises the mechanical properties of cross\u2010sectional specimens.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Clinical Significance<\/jats:title>\n                    <jats:p>The development of novel cubic\u2010containing multilayer zirconia ceramics to produce monolithic restorations brings new challenges to dental clinicians and laboratory technicians. The CAD\/CAM design of multilayered 5Y\/4Y restorations should consider the esthetic and mechanical requirements of each clinical case, as different properties are found in the different layers of these materials.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/jerd.13319","type":"journal-article","created":{"date-parts":[[2024,9,26]],"date-time":"2024-09-26T11:56:48Z","timestamp":1727351808000},"page":"525-532","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Optical and Mechanical Properties of the Multi\u2010Transition Zones of a Translucent Zirconia"],"prefix":"10.1111","volume":"37","author":[{"given":"Sonaj","family":"Vardhaman","sequence":"first","affiliation":[{"name":"Department of Preventive and Restorative Sciences, School of Dental Medicine University of Pennsylvania  Philadelphia Pennsylvania USA"},{"name":"College of Dental Medicine Columbia University  New York New York 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