Illuminant metamerism between natural teeth and zirconia restorations evaluated with a chromatic adaptation transform

IF 4.3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Journal of Prosthetic Dentistry Pub Date : 2024-11-01 DOI:10.1016/j.prosdent.2023.07.035

Sascha Hein MDT , Stephen Westland PhD

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Abstract

Statement of problem

Little is known about the effect of illuminant metamerism between natural teeth and zirconia restorations, despite their increasing clinical popularity.

Purpose

The purpose of this in vitro study was to compare illuminant metamerism between pairs of natural teeth and layered zirconia restorations and pairs of natural teeth and monolithic zirconia restorations under 10 different illuminants and analyze their metameric potential.

Material and methods

Spectral reflectance factors were obtained from 10 pairs of extracted natural teeth and layered zirconia restorations and 28 pairs of extracted natural teeth and monolithic multilayer zirconia restorations. Each pair showed a color match that was within the visual threshold for clinical acceptability (CIEDE2000≤1.8). A special index of metamerism for the change of illuminant (M_ilm) was calculated from the CIEDE2000 color difference equation. Descriptive statistics and the one-sample t test were used to analyze the results for the M_ilm and for both groups of layered and monolithic zirconia restorations (α=.05).

Results

Layered zirconia restorations reached a mean ±standard deviation value for M_ilm=0.3 ±0.2 and M_ilm=0.5 ±0.4 for monolithic zirconia restorations (P<.01).

Conclusions

The effect of illuminant metamerism between natural teeth and zirconia crowns was weak and generally within the clinical acceptability limit.

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用色度适应变换评估天然牙齿和氧化锆修复体之间的照度偏色。

问题陈述：尽管氧化锆修复体在临床上越来越受欢迎，但人们对天然牙和氧化锆修复体之间的光源变色效应知之甚少。目的：本体外研究的目的是比较天然牙和分层氧化锆修复体之间以及天然牙和单层氧化锆修复体之间在 10 种不同光源下的光源变色效应，并分析其变色潜力：从 10 对拔出的天然牙和分层氧化锆修复体以及 28 对拔出的天然牙和整体多层氧化锆修复体中获得光谱反射系数。每对牙齿的颜色匹配度都在临床可接受的视觉阈值范围内（CIEDE2000≤1.8）。根据 CIEDE2000 色差方程计算出了光源变化的特殊同色异谱指数 (Milm)。使用描述性统计和单样本 t 检验分析 Milm 以及分层氧化锆修复体和单片氧化锆修复体两组的结果（α=.05）：分层氧化锆修复体的平均值（±标准偏差）为 Milm=0.3 ±0.2，而整体氧化锆修复体的平均值（±标准偏差）为 Milm=0.5 ±0.4（PConclusions）：天然牙和氧化锆冠之间的照度偏差影响较弱，一般在临床可接受范围内。

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 Prosthetic Dentistry 医学-牙科与口腔外科

CiteScore

7.00

自引率

13.00%

发文量

599

审稿时长

69 days

期刊介绍： The Journal of Prosthetic Dentistry is the leading professional journal devoted exclusively to prosthetic and restorative dentistry. The Journal is the official publication for 24 leading U.S. international prosthodontic organizations. The monthly publication features timely, original peer-reviewed articles on the newest techniques, dental materials, and research findings. The Journal serves prosthodontists and dentists in advanced practice, and features color photos that illustrate many step-by-step procedures. The Journal of Prosthetic Dentistry is included in Index Medicus and CINAHL.