Efficacy of try-in paste and resin cement shades in prediction of the Final Color of multilayer Zirconia Veneers (An In-Vitro Study).

Document Type : Original Article

Authors

1 Associate professor,fixed prosthodontics department, faculty of dentistry ,Minia University

2 Fixed Prosthodontics Department, Faculty of Dentistry, Nahda University, Beni-Suef, Egypt.

3 Fixed Prosthodontics Department, Faculty of Dentistry, Minia University, Minia, Egypt.

Abstract

Objectives: Aimed to study the efficacy of using try- in paste resin cement shades, in prediction of the final perceived color of Cercon Veneer.

Material and Methods: tetragonal zirconia polycrystal stabilized with 5 mol% yttria and 9 wt.% yttria, Variolink Esthetic (LC) System kit for resin cement, and tetric N-ceram composite resin. A total of thirty CAD/CAM Cercon disks (diameter = 10mm), shade A2, and thickness of 0.5mm (n=30) fabricated. The ceramic groups were ordered into three subgroups, n=10 for each, according to the shade of luting cement used, then each subgroup ordered into two equal classes n=5 for each, according to the type of cement (final cement or try in paste). Thirty samples of resin background disks fabricated using a Teflon mold (10 x 3) mm to acquire a uniform background to resemble the prepared tooth substrate. The specimens' color was assessed by fixing them onto a grey background. Color parameters assessment was performed utilizing a spectrophotometer according to the CIE Lab color system. Results were then statistically analyzed using Shapiro-Wilk test to assess the normality of distribution, and two-way Anova.

Results: One way ANOVA test used for quantitative data between the 3 groups succeeded by post hoc LSD analysis between each two groups in 0.5 mm thickness, there was significant increase in ΔE in light shade compared with natural shade. there was insignificant difference between others.

Conclusion: Caution should be taken when using a try-in paste to determine the final restoration's color and addition test should be done.

Keywords

Minia Journal of Medical Research

Articles in Press, Accepted Manuscript
Available Online from 20 February 2023

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