Effects of veneering porcelain thickness and background shade on the shade match of zirconia-based restorations
Background. Effects of veneering porcelain thickness and background shade on the shade match of zirconia-based restorations are unclear. The aim of this study was to evaluate the impacts of veneering porcelain thickness and background shade on the shade match of zirconia-based restorations. Methods...
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Tabriz University of Medical Sciences
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doaj-585a9a1f264341b6a331819ae03085b82020-11-25T01:51:03ZengTabriz University of Medical SciencesJournal of Dental Research, Dental Clinics, Dental Prospects2008-210X2008-21182019-04-01131687410.15171/joddd.2019.011joddd-24185Effects of veneering porcelain thickness and background shade on the shade match of zirconia-based restorationsFarhad Tabatabaian0Khotan Aflatoonian1Mahshid Namdari2Department of Prosthodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, IranPrivate Practice, Tehran, IranDepartment of Community Oral Health, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, IranBackground. Effects of veneering porcelain thickness and background shade on the shade match of zirconia-based restorations are unclear. The aim of this study was to evaluate the impacts of veneering porcelain thickness and background shade on the shade match of zirconia-based restorations. Methods. Forty A2 shade veneered zirconia disk specimens (10 mm in diameter) were fabricated, with veneering porcelain thicknesses of 1.6, 1.8, 2.0 and 2.2 mm. Three backgrounds were made of A2 shade composite resin (A2), nickel-chromium alloy (NC) and amalgam (AM). The veneered zirconia specimens were placed on the backgrounds. CIELab values were measured with a spectrophotometer. ΔE values were measured to determine color differences between the specimens and the A2 VITA classical shade (target shade). ΔE values were compared with an acceptability threshold (ΔE=3.7). Repeated measures ANOVA, Bonferroni, and 1-sample t-test were used to analyze data (P<0.05). Results. Mean ΔE values ranged between 1.9 and 5.0. The veneering porcelain thickness, the background shade and their interaction affected the ΔE (P<0.0001). The minimum veneering porcelain thickness for the shade match was 2 mm for NC and 1.8 mm for AM. Conclusion. Veneering porcelain thickness and background shade affected the shade match of zirconia-based restorations. With dark-shaded backgrounds, the amount of veneering porcelain thickness needed for the shade match might be beyond acceptable clinical limits. Tooth-shaded backgrounds are esthetically advocated rather than dark-shaded backgrounds in zirconia-based restorations.https://joddd.tbzmed.ac.ir/PDF/joddd-24185Ceramicestheticsshadespectrophotometryzirconia |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Farhad Tabatabaian Khotan Aflatoonian Mahshid Namdari |
spellingShingle |
Farhad Tabatabaian Khotan Aflatoonian Mahshid Namdari Effects of veneering porcelain thickness and background shade on the shade match of zirconia-based restorations Journal of Dental Research, Dental Clinics, Dental Prospects Ceramic esthetics shade spectrophotometry zirconia |
author_facet |
Farhad Tabatabaian Khotan Aflatoonian Mahshid Namdari |
author_sort |
Farhad Tabatabaian |
title |
Effects of veneering porcelain thickness and background shade on the shade match of zirconia-based restorations |
title_short |
Effects of veneering porcelain thickness and background shade on the shade match of zirconia-based restorations |
title_full |
Effects of veneering porcelain thickness and background shade on the shade match of zirconia-based restorations |
title_fullStr |
Effects of veneering porcelain thickness and background shade on the shade match of zirconia-based restorations |
title_full_unstemmed |
Effects of veneering porcelain thickness and background shade on the shade match of zirconia-based restorations |
title_sort |
effects of veneering porcelain thickness and background shade on the shade match of zirconia-based restorations |
publisher |
Tabriz University of Medical Sciences |
series |
Journal of Dental Research, Dental Clinics, Dental Prospects |
issn |
2008-210X 2008-2118 |
publishDate |
2019-04-01 |
description |
Background. Effects of veneering porcelain thickness and background shade on the shade match of zirconia-based restorations are unclear. The aim of this study was to evaluate the impacts of veneering porcelain thickness and background shade on the shade match of zirconia-based restorations. Methods. Forty A2 shade veneered zirconia disk specimens (10 mm in diameter) were fabricated, with veneering porcelain thicknesses of 1.6, 1.8, 2.0 and 2.2 mm. Three backgrounds were made of A2 shade composite resin (A2), nickel-chromium alloy (NC) and amalgam (AM). The veneered zirconia specimens were placed on the backgrounds. CIELab values were measured with a spectrophotometer. ΔE values were measured to determine color differences between the specimens and the A2 VITA classical shade (target shade). ΔE values were compared with an acceptability threshold (ΔE=3.7). Repeated measures ANOVA, Bonferroni, and 1-sample t-test were used to analyze data (P<0.05). Results. Mean ΔE values ranged between 1.9 and 5.0. The veneering porcelain thickness, the background shade and their interaction affected the ΔE (P<0.0001). The minimum veneering porcelain thickness for the shade match was 2 mm for NC and 1.8 mm for AM. Conclusion. Veneering porcelain thickness and background shade affected the shade match of zirconia-based restorations. With dark-shaded backgrounds, the amount of veneering porcelain thickness needed for the shade match might be beyond acceptable clinical limits. Tooth-shaded backgrounds are esthetically advocated rather than dark-shaded backgrounds in zirconia-based restorations. |
topic |
Ceramic esthetics shade spectrophotometry zirconia |
url |
https://joddd.tbzmed.ac.ir/PDF/joddd-24185 |
work_keys_str_mv |
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