Colour prediction for restoring discoloured teeth using zirconia veneers

IF 4.8 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of dentistry Pub Date : 2025-06-13 DOI:10.1016/j.jdent.2025.105902

Yanlin Xia , Jiakang Zhu , Wenxiang Wang , Shanshan Liang , Cui Huang

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引用次数: 0

Abstract

Objectives

This study aimed to derive predictive formulas for the final colour of restorations for discoloured teeth using zirconia veneers.

Methods

Coping thickness and translucency of zirconia, background colour, and luting cement shade were assessed. Shapiro-Wilk, ANOVA, paired t-tests, independent t-tests, Tukey’s test, and Automatic linear modeling (p < 0.05) were employed to develop a clinically practical method for predicting the colour difference (ΔE) between sample combinations (SCs) and the shade guides. ΔE values were evaluated against perceptibility (PT = 2.6) and acceptability (AT = 5.5) thresholds.

Results

Most discoloured teeth could be restored for A2 or A3 target shade. Using 1.5 mm CAD-CAM zirconia ceramic can achieve PT when the background colour is ND5, ND7, ND8. ΔE between the 1.5 mm LT SCs and the A2 shade guide is mostly within the AT range. ΔE between SCs and A2 shade guide showed a positive association with ND9 and negative associations with ND4, ND5, 1.5 mm, 1.0 mm, LT, and BL (p < 0.001). ΔE between SCs and A3 shade guide correlated positively with ND4, ND5, and ND9 but negatively with 1.5 mm, 1.0 mm, and LT (p < 0.001).

Conclusions

Each factor differentially influenced the final colour, with background colour being the most significant, followed by coping thickness. Two formulas can be used to predict ΔE between the restoration for discoloured teeth using zirconia veneers and the target shade (A2 or A3).

Clinical significance

The proposed formulas facilitate colour prediction in zirconia veneers for discoloured teeth, enhancing clinical aesthetic outcomes.

查看原文本刊更多论文

用氧化锆贴面修复变色牙齿的颜色预测。

目的：本研究旨在为使用氧化锆贴面修复变色牙齿的最终颜色得出预测公式。方法：评价氧化锆覆层厚度、透光率、底色、水泥色度。采用Shapiro-Wilk、方差分析、配对t检验、独立t检验、Tukey检验和自动线性建模（p < 0.05）来开发一种临床实用的方法来预测样品组合（SCs）和色差指南（ΔE）。根据可感知性（PT = 2.6）和可接受性（AT = 5.5）阈值评估ΔE值。结果：大多数变色牙均可修复为A2或A3目标阴影。采用1.5 mm CAD-CAM氧化锆陶瓷，在背景色为ND5、ND7、ND8时可实现PT。ΔE 1.5 mm LT sc和A2遮光指南之间的大部分在AT范围内。ΔE在SCs和A2遮荫指南中与ND9呈正相关，与ND4、ND5、1.5 mm、1.0 mm、LT和BL呈负相关（p < 0.001）。SCs和A3遮荫指南ΔE与ND4、ND5和ND9呈正相关，与1.5 mm、1.0 mm和LT呈负相关（p < 0.001）。结论：各因素对最终颜色的影响有差异，其中底色影响最大，其次是顶部厚度。两个公式可以用来预测使用氧化锆贴面修复变色牙齿与目标阴影（A2或A3）之间的ΔE。临床意义：提出的配方有助于预测变色牙齿的氧化锆贴面颜色，提高临床美观效果。

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

Journal of dentistry 医学-牙科与口腔外科

CiteScore

7.30

自引率

11.40%

发文量

349

审稿时长

35 days

期刊介绍： The Journal of Dentistry has an open access mirror journal The Journal of Dentistry: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The Journal of Dentistry is the leading international dental journal within the field of Restorative Dentistry. Placing an emphasis on publishing novel and high-quality research papers, the Journal aims to influence the practice of dentistry at clinician, research, industry and policy-maker level on an international basis. Topics covered include the management of dental disease, periodontology, endodontology, operative dentistry, fixed and removable prosthodontics, dental biomaterials science, long-term clinical trials including epidemiology and oral health, technology transfer of new scientific instrumentation or procedures, as well as clinically relevant oral biology and translational research. The Journal of Dentistry will publish original scientific research papers including short communications. It is also interested in publishing review articles and leaders in themed areas which will be linked to new scientific research. Conference proceedings are also welcome and expressions of interest should be communicated to the Editor.