期刊
DENTAL MATERIALS
卷 24, 期 11, 页码 1539-1544出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dental.2008.03.020
关键词
Translucency; All-ceramic core and veneer; CIE standard illuminant
资金
- Korea Science & Engineering Foundation, Republic of Korea [R01-2006-000-10421-0]
- National Research Foundation of Korea [전06A1202, R01-2006-000-10421-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Objectives. The objective of this study was to determine the differences in the translucency parameter (TP) of all-ceramic core, veneer and layered specimens relative to the CIE standard illuminant D-65, A and F2. Methods. The A2-corresponding shade of seven all-ceramic core materials and one sintering ceramic as a reference were prepared in clinically relevant thicknesses (n = 7). The A2- and A3-corresponding shades of each recommended veneer ceramics were fabricated so that the thickness of the layered specimen was 1.5 mm. The color of core, veneer and layered specimens was measured over white and black backgrounds relative to the illuminant D65, A and F2 with a reflection spectrophotometer. TP value was obtained by calculating the color difference between the specimen over the white and that over the black background. Differences of TP values by the illuminant (Delta TP) were analyzed with three-way analysis of variance (ANOVA), with the fixed factors of the type of ceramic, the brand/thickness of ceramic within each type and the combination of illuminants (alpha = 0.05). Results. Delta TP values were influenced by three factors based on three-way ANOVA. Higher translucent materials showed higher difference in TP value by the illuminants. TP(D-65) was lower than TP(F2) and TP(A) values. Correlation coefficients between TP values relative to the different illuminants were higher than 0.994 (p < 0.01). Significance. Translucency of all-ceramic materials under daylight condition was lower than those under incandescent or fluorescent lamps. Therefore, this difference should be considered when shade matching translucent shades of all-ceramics. (C) 2008 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据