{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T16:01:40Z","timestamp":1770825700223,"version":"3.50.1"},"reference-count":35,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2025,4,10]],"date-time":"2025-04-10T00:00:00Z","timestamp":1744243200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Applied Sciences"],"abstract":"<jats:p>This study evaluated if the material, the substrate, and the cement have no influence on the color of pre-shaded monolithic zirconia crowns. The specific effect of the cement over each substrate\/brand group was also studied. Two commercial brands of zirconia, Amann Girrbach (AG) and Zirkonzahn (ZZ), were used to produce crowns that were placed over three substrates (natural tooth, zirconia, metal) using two different resin cements (Ivoclar AG (Shaan, Liechtenstein) Neutral and Light) or glycerol (as the control) (n = 10). Lightness (L*), chroma (C*), hue (h*), and color difference (\u0394E) of each crown were measured using a VITA Easyshade V\u00ae spectrophotometer (VITA Zahnfabrik, Bad S\u00e4ckingen, Germany), following the standardized reference. Since normality was not verified by the Shapiro\u2013Wilk test, data were statistically analyzed using the Kruskal\u2013Wallis test for group comparisons and Tukey\u2019s post-hoc test for multifactorial variance analysis (\u03b1 = 0.05). \u0394E medians ranged between 1.3 in the AG\/zirconia substrate\/glycerol group and 8.0 in the ZZ\/metal substrate\/light cement group. In general, lower values of \u0394E were recorded in AG restorations compared to ZZ (p &lt; 0.05), zirconia, and natural tooth substrates compared to metal (p &lt; 0.001) and neutral compared to light cements (p &lt; 0.05). Specifically, over the metal substrate, AG crowns with neutral cement and ZZ crowns with neutral cement and glycerol showed lower \u0394E values (p &lt; 0.05). Over the zirconia substrate, light cement presented higher \u0394E values than glycerol in both brands but similar to neutral cement. Over the natural tooth, no significant differences were observed between cements (p &gt; 0.05) in the AG brand, while in the ZZ group, light cement showed higher \u0394E values (p &lt; 0.05). The final color of the restorations was significantly influenced by the zirconia brand, substrate type, and resin cement. Light cement led to greater color variations, particularly in ZZ restorations. These findings highlight the importance of material selection in achieving esthetically pleasing zirconia restorations.<\/jats:p>","DOI":"10.3390\/app15084160","type":"journal-article","created":{"date-parts":[[2025,4,10]],"date-time":"2025-04-10T07:41:51Z","timestamp":1744270911000},"page":"4160","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Color Evaluation of Pre-Shaded Monolithic Zirconia Restorations on Different Substrates and Resin Cements"],"prefix":"10.3390","volume":"15","author":[{"given":"Vanessa","family":"Fonseca","sequence":"first","affiliation":[{"name":"Faculdade de Medicina Dent\u00e1ria, Universidade de Lisboa, 1600-277 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4327-1372","authenticated-orcid":false,"given":"Cristina Bettencourt","family":"Neves","sequence":"additional","affiliation":[{"name":"Dental Biomaterials Research Group (BIOMAT), Biomedical and Oral Sciences Research Unit (UICOB), Faculdade de Medicina Dent\u00e1ria, Universidade de Lisboa, 1600-277 Lisboa, Portugal"},{"name":"Research Institute for Medicines (iMed.ULisboa), Faculdade de Farm\u00e1cia, Universidade de Lisboa, 1649-003 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5058-6554","authenticated-orcid":false,"given":"Jaime","family":"Portugal","sequence":"additional","affiliation":[{"name":"Dental Biomaterials Research Group (BIOMAT), Biomedical and Oral Sciences Research Unit (UICOB), Faculdade de Medicina Dent\u00e1ria, Universidade de Lisboa, 1600-277 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8526-398X","authenticated-orcid":false,"given":"Vitor","family":"Anes","sequence":"additional","affiliation":[{"name":"IDMEC, Instituto Superior de Engenharia de Lisboa, Polytechnic University of Lisbon, 1959-007 Lisbon, Portugal"},{"name":"Unit for Innovation and Research in Engineering, Polytechnic University of Lisbon, 1959-007 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4274-7423","authenticated-orcid":false,"given":"Filipa","family":"Chasqueira","sequence":"additional","affiliation":[{"name":"Center for Interdisciplinar Research (CiiEM), Egas Moniz School of Health and Science, 2829-511 Almada, Portugal"}]},{"given":"Jo\u00e3o Carlos","family":"Roque","sequence":"additional","affiliation":[{"name":"Dental Biomaterials Research Group (BIOMAT), Biomedical and Oral Sciences Research Unit (UICOB), Faculdade de Medicina Dent\u00e1ria, Universidade de Lisboa, 1600-277 Lisboa, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2025,4,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"765","DOI":"10.1016\/j.prosdent.2021.01.012","article-title":"Influence of Different Materials on Retention Behavior of CAD-CAM Fabricated Bar Attachments","volume":"128","author":"Abdelrehim","year":"2022","journal-title":"J. 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