Uctasli S, Hasanreisoglu U, Wilson H J
School of Dentistry, University of Birmingham, U.K.
J Oral Rehabil. 1994 Sep;21(5):565-75. doi: 10.1111/j.1365-2842.1994.tb01171.x.
The influence of porcelain thickness and opacity on the polymerization of two dual activated (microfine and hybrid) and one light irradiated (hybrid) resin cements was assessed by hardness measurements. The surface microhardness values of the upper and lower surface of 1 mm thick resin cement specimens were determined. Specimens were polymerized using 40s irradiation beneath different thicknesses and opacities of porcelain discs. The results showed that increasing the thicknesses and opacity of the porcelain produced a statistically significant decrease in microhardness of the resin-based cements. The effect of attenuation is less for the microfine cement than for the hybrids. In the case of hybrid cements, the light activated material performed better than the dual activated cement.
通过硬度测量评估了瓷厚度和不透明度对两种双重固化（微细化和混合）以及一种光固化（混合）树脂水门汀聚合的影响。测定了1毫米厚树脂水门汀试件上下表面的表面显微硬度值。在不同厚度和不透明度的瓷盘下照射40秒使试件聚合。结果表明，增加瓷的厚度和不透明度会使树脂基水门汀的显微硬度在统计学上显著降低。微细化水门汀的衰减效应小于混合水门汀。对于混合水门汀，光固化材料的性能优于双重固化水门汀。
