Effect of Tooth Bleaching on The Color Change of Laminate Veneer Restorations: A Pilot Study

Year 2024, Volume: 14 Issue: 3, 625 - 630, 30.09.2024

Buse Atak Ay , Şebnem Begüm Türker

https://doi.org/10.33808/clinexphealthsci.1222795

Abstract

Objective: This pilot study aimed to evaluate the effect of tooth bleaching on the long-term color change of laminate veneers restored with different translucency CAD/CAM materials.
Methods: In this study, 20 upper central teeth extracted due to periodontal, orthodontic problems and trauma were used. The teeth were embedded in acrylic blocks and divided into 4 groups of 5 teeth each. Groups A and B were bleached with a vital bleaching agent for two 20-minute sessions before preparation and teeth were prepared for laminate veneer restoration following bleaching. Groups C and D were prepared without bleaching treatment. Groups A and C were restored with high translucent A1 IPS Emax CAD material and Groups B and D were restored with low translucent A1 IPS Emax CAD material. For all restorations adhesive cementation was applied and aged for 2 years by thermal cycling. The color of the restorations was measured using a spectrophotometer after cementation and the measurement was
done again after 2 years aging. The Kruskal Wallis test was used to compare data and multiple comparisons were tested with Dunn’s test.
Results: The translucency of the blocks and tooth bleaching caused a significant difference between the groups according to the Kruskal Wallis test. Color changes (ΔE00) of Group A, B, C and D was 0.89±0.01, 0.87±0.01, 0.81±0.01, 0.8±0.01 respectively.
Conclusion: Tooth bleaching causes a greater color change in laminate veneer restorations and the translucency of the material affects the color change of the laminate veneer restorations after aging.

Keywords

Laminate veneer, Bleaching, translucency, IPS Emax CAD

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