摘要
目的:研究3种烤瓷修复体之间及与Vita标准比色片之间的色差。方法:实验组为In-Ceram全瓷修复体(A组)、钛金属烤瓷修复体(B组)、镍铬合金烤瓷修复体(C组)。对照组为VitaA2标准比色片(D组)。实验组每组10个圆盘状试件,每个试件直径15mm。玻璃渗透氧化铝底层和金属底层均厚1mm。使用VitaA2瓷粉,遮色瓷厚0.2mm,体瓷厚1mm,透明瓷厚0.4mm,按操作常规烧制。使用SpectrascanPR650分光光谱测色仪测试试件和VitaA2标准比色片。颜色系统为CIE1976L*a*b*色度系统。结果:各实验组之间除A-C组的a*值外,其余的色度值之间均有显著差异。3组之间的色差范围为3.25-8.50△E。与标准比色片相比,除C-D组的L*值和b*值及A-D组的b*值外,其余色度值之间均有显著差异。实验组与标准比色片的色差范围为2.29-8.31△E。结论:实验组之间及与标准比色片之间色差过大,应进一步改进这3种烤瓷修复体的颜色匹配性能。
Objective ： To study color differences among three types of porcelain restorations and between these restorations and Vita shade tab. Methods： The experimental group was divided into three groups, 10 specimens for each group, which consistsd of In-Ceram system （A group）, the Titanium metal porcelain restoration （B group）, and the Ni-Cr alloy porcelain restoration （C group）. Vita A2 shade tab was used to be the control （D group）. All specimens in disk from with 15 mm diameter were prepared. The glass-infiltrated porous aluminum oxide substructure was 1 mm thickness and the metal substructure was the same thickness. The specimens were fabricated to match the color and translucency of Vita A2 shad tab. The opaque porcelain was 0.2 mm thickness and the dentine porcelain was 1 mm thickness. The translucent porcelain was 0.4 mm thickness. The porcelain firing and the glaze firing were completed according to the manufacturer＇ s instructions. The specimens and Vita A2 shade tab were measured with Spectranscan PR650 spectracolorimeter. Mean CIELAB values were determind after three separate measurements in succession. Results： Significant differences were found to be in L^＊ values, a^＊ values, and b^＊ values among three experimental groups except for the comparison of A group and C group in a^＊ values. The values of color differences among three experimental groups were 3.25ΔE（A-C）, 8.35ΔE （A-B）, and 8.50ΔE（B-C） values. There were significant differences in L^＊ values, a^＊ values, and b^＊ values between the experimental groups and Vita A2 shade tab in addition to comparing C group and D group in L^＊ values and b^＊ values, comparing A group and D group in b^＊ values. The values of color differences between the expenrimental groups and Vita A2 shade tab were 2.29 ΔE （C-D）, 3.02ΔE （A-D）, and 8.31ΔE （B-D） values. Conclusion： The values of color differences were higher among three experimental groups and between the experimental groups and Vita A2 shade tab. The color matching of three types of porcelain restorations with Vita shade tab should be improved.
出处
《口腔颌面修复学杂志》
2005年第4期256-258,共3页
Chinese Journal of Prosthodontics
基金
广东省医学科研基金资助项目(A2000713)
