Comparison of accuracy between visual and spectrophotometric shade matching
10.3321/j.issn:1002-0098.2008.10.007
- VernacularTitle:比色板与电脑比色仪比色准确性的分析
- Author:
Ming-Ming XU
1
;
Feng LIU
;
Feng ZHANG
;
Zhong DING
Author Information
1. 北京大学口腔医学院(口腔医院)
- Keywords:
Esthetics,dental;
Shade selection;
Computer-aided spectrophotometer;
Shadeguide
- From:
Chinese Journal of Stomatology
2008;43(10):601-603
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare visual and spectrophotometric shade matching using Vita Easyshade and to evaluate its accuracy.Methods One hundred and twenty participants with single anterior full ceramic restorations were included in this study. Subjects were randomly assigned to 2 groups,the visual shade matching group (Group V) and the spectrophotometric shade matching (Vita Easyshade) group(Group S).In each group, subjects were allocated into 2 subgroups,those matched with shade tabs (V1,S1) and those out of shade tabs (V2,S2).Following the treatment,the Commission Internationale de I'Eclairage lab parameters were tested using the spectrophotometric,and the AE*ab between the restoration and contrast teeth was calculated.Results There were significant differences between AE*abv (3.92±1.59) and △E*abs (2.23±0.96),and also between AE*abv2(4.42±1.42) and AE*abs2(2.27±1.01),AE*abv1(2.29±0.88) and △E*abv2(P＜0.01).There was no significant difference between AE*abv1 and AE*abs1 (2.12±0.84) (P=0.698),nor between AE*abs1 and AE*abs2 (P=0.014).Conclusions Spectropotometric (Vita Easyshade) shade matching method is more accurate than visual shade matching when used on tooth that has out-of-shade-tab eolour expression.It provides better colour reappearance,than does visual colour matching.
