Translucency, opalescence and light transmission characteristics of light-cured resin composites
Translucency, opalescence and light transmission characteristics of light-cured resin composites
复制标题
DOI：
10.1016/j.dental.2010.07.009
复制
发表时间：
2010-11-01
期刊：
影响因子：
5
通讯作者：
Tagami, Junji
中科院分区：
文献类型：
--
作者：
Arimoto, Ayako;Nakajima, Masatoshi;Tagami, Junji
目标。评价不同厚度树脂复合材料的半透明性、乳光性和透光性。制备了3种A2遮光树脂复合材料（Estelite Sigma、Beautifil II、Clearfil Majesty）的圆盘，直径为10 mm，厚度为0.5 mm、1.0 mm、2.0 mm。在反射分光光度计和色雾计上按CIELAB色标测量颜色，计算半透明参数（TP）和乳光参数（OP）。利用角形光强计透射光强分布图，计算了用于表示漫射透射特性的扩散系数（DF）和用于表示直线透射特性的峰值增益（G0）。TP值和G0值从0.5 mm > 1.0 mm > 2.0 mm厚度依次显著降低（p < 0.05）。从1.0 mm到2.0 mm， OP值随树脂复合材料厚度的增加而增加（p < 0.05），而0.5 mm和1.0 mm组的OP值基本相同。DF值从0.5 mm增加到1.0 mm，但1.0 mm和2.0 mm组的DF值基本相同。TP与DF有显著相关（R(2) = 0.96, p < 0.001）。另一方面，OP与DF呈弱相关（R(2) = 0.21, p < 0.005），但在0.5 mm厚组内，OP与DF呈高度相关（R(2) = 0.84, p < 0.001）。在0.5 mm厚度下，树脂复合材料的半透明性（TP）和乳光性（OP）与扩散透射性（DF）呈显著相关。当树脂复合材料厚度大于1.0 mm时，半透明性和乳光性受厚度的影响，其中半透明性显著降低，乳光性显著增加。(c) 2010年牙科材料学会。Elsevier Ltd.出版。版权所有。
Objectives. To evaluate the translucency, opalescence and light transmission characteristics of resin composites with different thicknesses.Methods. Disks of three resin composites (Estelite Sigma, Beautifil II, Clearfil Majesty) of A2 shade were prepared in diameter of 10 mm with various thicknesses (0.5 mm, 1.0 mm and 2.0 mm). Color was measured according to CIELAB color scale on a reflection spectrophotometer and a color haze meter, and translucency parameter (TP) and opalescence parameter (OP) were calculated. Using the distribution graphs of transmitted light intensity on a goniophotometer, diffusion factor (DF) as an indicator for a diffuse transmission property and peak gain (G0) for a straight-line transmission property were calculated.Results. The TP and G0 values significantly decreased in the order: 0.5 mm > 1.0 mm > 2.0 mm thickness (p < 0.05). The OP value increased as the thickness of resin composite increased from 1.0 mm to 2.0 mm(p < 0.05), while was similar for the 0.5 mm- and 1.0 mm-thick groups. The DF value increased from 0.5 mm to 1.0 mm, but was similar for the 1.0 mm- and 2.0 mm-thick groups. There was a significant correlation between TP and DF (R(2) = 0.96, p < 0.001). On the other hand, there was a weak correlation between OP and DF (R(2) = 0.21, p < 0.005), however within the values of the 0.5 mm-thick group, OP was highly correlated with DF (R(2) = 0.84, p < 0.001).Significance. At the 0.5 mm thickness, the translucency (TP) and opalescence (OP) of resin composites had a significant correlation with a diffuse transmission property (DF). When more than 1.0 mm thickness of resin composites, translucency and opalescence were influenced by the thickness, in which translucency significantly decreased and opalescence significantly increased. (c) 2010 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.