{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T08:00:07Z","timestamp":1790841607861,"version":"4.1.0"},"reference-count":32,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T00:00:00Z","timestamp":1790812800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T00:00:00Z","timestamp":1790812800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100002322","name":"Coordena\u00e7\u00e3o de Aperfei\u00e7oamento de Pessoal de N\u00edvel Superior","doi-asserted-by":"publisher","award":["001"],"award-info":[{"award-number":["001"]}],"id":[{"id":"10.13039\/501100002322","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J Esthet Restor Dent"],"abstract":"ABSTRACT<\/jats:title>\n \n Purpose<\/jats:title>\n The aim of the present study was to assess the substrate masking ability of veneered zirconia and lithium disilicate ceramic frameworks in two shades and with different thicknesses and translucencies.<\/jats:p>\n <\/jats:sec>\n \n Material and Methods<\/jats:title>\n \n Disc\u2010shaped framework specimens (8\u2009mm in diameter; 0.8\u2009mm and 1.3\u2009mm in thickness) were fabricated with lithium disilicate (LD) (from ingots of medium\u2010opacity, MO and high\u2010opacity, HO) and zirconia (3Y\u2010TZP, sintered at 1350\u00b0C and 1550\u00b0C, to modulate translucency). Porcelain discs (0.4\u2009mm dentin and 0.3\u2009mm enamel) were produced as veneer layers. Specimens were produced in shades A1 and BL2. Lightness (\n L<\/jats:italic>\n *), chroma (\n C<\/jats:italic>\n *), and hue angle (\n h<\/jats:italic>\n \u00b0) were measured. The translucency parameter (TP\n 00<\/jats:sub>\n ) and whiteness index for dentistry (WI\n D<\/jats:sub>\n ) were calculated. Color differences (\u2206\n E<\/jats:italic>\n 00<\/jats:sub>\n ) were assessed from data obtained from ceramic specimens placed over reference (A1) and discolored substrates (A4, C4, coppery and silvery metals). Data were analyzed with one\u2010way ANOVA and the Tukey test (\n \u03b1<\/jats:italic>\n \u2009=\u20090.05). \u2206\n E<\/jats:italic>\n 00<\/jats:sub>\n values were compared with the perceptibility (PT\u2009=\u20090.81) and acceptability (AT\u2009=\u20091.77) thresholds. Pearson correlation analysis was performed for the outcomes of TP\n 00<\/jats:sub>\n and \u2206\n E<\/jats:italic>\n 00<\/jats:sub>\n .\n <\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n All outcomes of the study were significantly influenced by the different frameworks (\n p<\/jats:italic>\n \u2009<\u20090.001). Specimens of 3Y\u2010TZP sintered at 1350\u00b0C and LD\u2010HO showed higher\n L<\/jats:italic>\n * and\n C<\/jats:italic>\n * and lower\n h<\/jats:italic>\n \u00b0, WI\n D<\/jats:sub>\n , TP\n 00<\/jats:sub>\n , and \u2206\n E<\/jats:italic>\n 00<\/jats:sub>\n values than the other groups, especially with thicker frameworks (\n p<\/jats:italic>\n \u2009<\u20090.001); \u2206\n E<\/jats:italic>\n 00<\/jats:sub>\n values below the PT and AT were obtained with the referred specimens over all discolored substrates for both A1 and bleach\u2010shade ceramics. Specific groups of LD\u2010MO and 3Y\u2010TZP sintered at 1550\u00b0C showed \u2206\n E<\/jats:italic>\n 00<\/jats:sub>\n values below the AT over A4 and copper\u2010colored metal substrates. Thicker frameworks reduced TP\n 00<\/jats:sub>\n and \u2206\n E<\/jats:italic>\n 00<\/jats:sub>\n values of all ceramics. Outcomes of TP\n 00<\/jats:sub>\n and \u2206\n E<\/jats:italic>\n 00<\/jats:sub>\n showed a strong and positive correlation.\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n Masking of discolored substrates was achieved with veneered zirconia and lithium disilicate frameworks, depending on ceramic thickness and translucency relative to each substrate.<\/jats:p>\n <\/jats:sec>\n \n Clinical Significance<\/jats:title>\n Discolored substrates can be predictably masked by ceramic restorations produced with porcelain\u2010veneered frameworks, especially those of 3Y\u2010TZP zirconia sintered at lower temperatures and from lithium disilicate with high opacity. Such outcomes are obtained for both A1 and bleach\u2010shade ceramics.<\/jats:p>\n <\/jats:sec>","DOI":"10.1111\/jerd.70276","type":"journal-article","created":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T07:24:19Z","timestamp":1790839459000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Effect of Translucency and Thickness of Zirconia and Lithium Disilicate Veneered Frameworks in Different Shades on the Masking Ability of Discolored Substrates"],"prefix":"10.1111","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-1901-0411","authenticated-orcid":false,"given":"Duvan Cala","family":"Castillo","sequence":"first","affiliation":[{"name":"Post\u2010Graduate Program in Dental Sciences Federal University of Santa Maria (UFSM) Santa Maria Rio Grande do Sul Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7853-5967","authenticated-orcid":false,"given":"Rafaela Oliveira","family":"Pilecco","sequence":"additional","affiliation":[{"name":"Post\u2010Graduate Program in Dentistry Federal University of Rio Grande do Sul (UFRGS) Porto Alegre Rio Grande do Sul Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9077-9067","authenticated-orcid":false,"given":"Gabriel Kalil Rocha","family":"Pereira","sequence":"additional","affiliation":[{"name":"Post\u2010Graduate Program in Dental Sciences Federal University of Santa Maria (UFSM) Santa Maria Rio Grande do Sul Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9913-8290","authenticated-orcid":false,"given":"Ata\u00eds","family":"Bacchi","sequence":"additional","affiliation":[{"name":"Independent Researcher Passo Fundo Rio Grande do Sul Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,10,1]]},"reference":[{"issue":"4","key":"e_1_2_9_2_1","doi-asserted-by":"crossref","first-page":"240","DOI":"10.1111\/jerd.12111","article-title":"Color\u2010Matching Strategies for Non\u2010Vital Discolored Teeth: Part I: Laboratory Ceramic Veneer Fabrication Solutions","volume":"26","author":"Chu S. 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