Color change of laminate veneer restorations applied to bleached teeth.

IF 2 4区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

International Journal of Computerized Dentistry Pub Date : 2025-06-27 DOI:10.3290/j.ijcd.b5117207

Buse Atak Ay, Şebnem Begüm Türker

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引用次数: 0

Abstract

Aim: The aim of the present study was to examine the color stability of laminate veneer restorations fabricated with various CAD/CAM materials applied to bleached teeth.

Materials and methods: Eighty maxillary central incisors extracted due to periodontal, orthodontic, or trauma problems were used. The teeth were embedded in acrylic blocks and divided into eight groups (n = 10). Groups A, B, C, and D were bleached with a vital bleaching agent before preparation, and the teeth were prepared for laminate veneer restorations. Groups E, F, G, and H were prepared without bleaching. Groups A and E were restored with GC Initial LiSi HT Blocks A1, Groups B and F with GC Initial LiSi LT Blocks A1, Groups C and G with IPS e.max CAD HT Blocks A1, and Groups D and H with IPS e.max CAD LT Blocks A1. All restorations were adhesively cemented and aged for 2 and 5 years with thermal cycling. Color measurements of the restorations were taken with a spectrophotometer at baseline and after 2 and 5 years of aging.

Results: Teeth in all the bleached groups showed more color changes than those in the unbleached groups. After 2 years of aging, the least color change was observed with GC Initial LiSi LT (ΔE00 = 0.808) and IPS e.max CAD LT (ΔE00 = 0.813) materials, which were used on unbleached teeth, and the most color change was observed with GC Initial LiSi HT (ΔE00 = 0.934) and IPS e.max CAD HT (ΔE00 = 0.923) materials, which were used on bleached teeth. After 5 years of aging, the least color change was observed with IPS e.max CAD LT (ΔE00 = 0.831) and GC Initial LiSi LT (ΔE00 = 0.839) materials, which were used on unbleached teeth, and the most color change was observed with GC Initial LiSi HT (ΔE00 = 0.957) and IPS e.max CAD HT (ΔE00 = 0.938) materials, which were used on bleached teeth.

Conclusions: Bleaching and translucency affect color stability. No difference was detected between the color changes of GC Initial LiSi and IPS e.max CAD materials. The increase in aging time increased the color changes of all materials.

Clinical significance: Bleaching and laminate veneer restorations may be preferred in many patients. For this reason, the long-term color changes of laminate veneer restorations applied to bleached teeth is clinically very relevant. The present study aimed to evaluate the effect of tooth bleaching on the long-term color stability of laminate veneer restorations fabricated with various CAD/CAM materials of different translucencies.

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用于漂白牙齿的层压板贴面修复体的颜色变化。

研究目的本研究的目的是检测在漂白过的牙齿上使用 CAD/CAM 材料修复的层压贴面修复体的颜色稳定性：本研究使用了 80 颗因牙周、正畸或外伤问题而拔除的上中牙。这些牙齿被嵌入丙烯酸树脂块中，分为 8 组（n=10）。A 组、B 组、C 组和 D 组在制备前使用活力漂白剂漂白牙齿，然后制备层压贴面修复体。E、F、G 和 H 组未经漂白。A 组和 E 组使用 A1 GC LiSi initial HT 嵌体修复，B 组和 F 组使用 A1 GC LiSi initial LT 嵌体修复，C 组和 G 组使用 A1 IPS Emax CAD HT 嵌体修复，D 组和 H 组使用 A1 IPS Emax CAD LT 嵌体修复。所有修复体均采用粘接剂粘接，并经过 2 年和 5 年的热循环老化。用分光光度计测量修复体在开始、老化 2 年和 5 年后的颜色：结果：所有漂白组的颜色变化都比未漂白组大。用于未漂白牙齿的 GC LiSi Initial LT（ΔE00=0.81）和 IPS Emax CAD LT（ΔE00=0.81）材料在老化 2 年后的颜色变化最小，用于漂白牙齿的 GC Initial LiSi HT（ΔE00=0.93）和 IPS Emax CAD HT（ΔE00=0.92）材料的颜色变化最大。经过 5 年的老化，在未漂白牙齿上使用的 IPS Emax CAD LT（ΔE00=0.83）和 GC LiSi Initial LT 材料（ΔE00=0.84）的颜色变化最小，而在漂白牙齿上使用的 GC Initial LiSi HT（ΔE00=0.96）和 IPS Emax CAD HT 材料（ΔE00=0.94）的颜色变化最大：结论：漂白和半透明会影响颜色的稳定性。GC LiSi Initial 和 IPS Emax CAD 材料的颜色变化没有差异。老化时间的延长会增加所有材料的颜色变化：临床意义：漂白和层压贴面修复可能是许多患者的首选。因此，应用于漂白牙齿的层压贴面修复体的长期颜色变化在临床上非常重要。本研究旨在评估牙齿漂白对使用不同半透明 CAD/CAM 材料制作的薄片贴面修复体的长期颜色变化的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Computerized Dentistry Dentistry-Dentistry (miscellaneous)

CiteScore

2.90

自引率

0.00%

发文量

期刊介绍： This journal explores the myriad innovations in the emerging field of computerized dentistry and how to integrate them into clinical practice. The bulk of the journal is devoted to the science of computer-assisted dentistry, with research articles and clinical reports on all aspects of computer-based diagnostic and therapeutic applications, with special emphasis placed on CAD/CAM and image-processing systems. Articles also address the use of computer-based communication to support patient care, assess the quality of care, and enhance clinical decision making. The journal is presented in a bilingual format, with each issue offering three types of articles: science-based, application-based, and national society reports.