Color agreement between try-in paste and resin cement: Effect of thickness and regions of ultra-translucent multilayered zirconia veneers.

Mehdi Daneshpooy,Seyed Reza Khosravani,Parnian Alizade Oskoee,Saeede Asdagh,Mahmoud Bahari,Fatemeh Pournaghi Azar

doi:10.15171/joddd.2019.010

Mehdi Daneshpooy, Seyed Reza Khosravani + Show 4 more

Open Access

https://doi.org/10.15171/joddd.2019.010

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Abstract

Background. The current study aimed at identifying the color agreement between try-in pastes and the respective resin cements and investigated the effect of thickness and regions of Ultra-Translucent Multilayered Zirconia Veneers. Methods. A total of 90 cubic zirconia discs were prepared at two different thicknesses (0.5 mm and 0.7 mm) (n=45) in five groups in terms of the shade of the try-in paste and resin cement as follows: Universal, Clear, Brown, White and Opaque. Try-in paste and the respective resin cement were applied between the specimens and composite substrate, respectively, and colorimetric evaluation was carried out using CIE-Lab system. For each specimen, ΔE between the try-in paste and cement was calculated. Data were analyzed with SPSS 17 using Multifactor ANOVA (P<0.05). Results. Multifactor ANOVA results showed that ΔE values were significantly affected by the resin cement shade and the thickness of ceramic veneer (P<0.05). The results showed better shade agreement between the try-in paste and the respective resin cement with thicker ceramic veneers. The results of Tukey HSD revealed that ΔE values for the Clear, Universal and Brown shades were less than those of the White and Opaque shades. Lighter shades exhibited better agreement between the try-in paste and the respective resin cement. Conclusion. Perceptible color difference was found between the try-in pastes and the respective resin cement in most colors investigated. Although, the agreement of the try-in pastes and the respective resin cement was affected by the thickness of zirconia veneers, the different regions of multilayered ultra-translucent zirconia ceramic showed no significant effect.

Highlights

The esthetic expectations of patients for achieving good results in anterior teeth necessitates materials with optical properties similar to natural teeth.[1]
The agreement of the try-in pastes and the respective resin cement was affected by the thickness of zirconia veneers, the different regions of multilayered ultra-translucent zirconia ceramic showed no significant effect
Different regions of multilayered ultra-translucent zirconia ceramic showed no significant effect on the agreement between the try-in paste and the respective resin cement (Table 3); the highest ΔE was related to the incisal region (1.58)

Summary

Introduction

The esthetic expectations of patients for achieving good results in anterior teeth necessitates materials with optical properties similar to natural teeth.[1]. The dentist and patient can evaluate color changes in the tooth/veneer system using try-in pastes that correspond to the same shades of resin cements; the esthetic expectation is achieved.[8] The shade agreement between the try-in systems and respective cements has been evaluated in different studies, but no significant differences have been found.[8,9,10,11,12] Xing et al reported that the shade of try-in paste and the corresponding resin cement attained high agreement. The null hypotheses of this study were: 1) There is no perceptible color difference between the resin cement and corresponding try-in paste) 2,3) The thicknesses and different regions of multilayered ceramic veneer have no significant effect on the agreement of try-in pastes and the respective resin cements.

Methods

Results

Conclusion