SY-1硅橡胶无限光学厚度的研究

Study on infinity optical thickness of SY-1 silicone elastomers

目的 :找出色差值△E =1.5时 ,SY 1硅橡胶的无限光学厚度。方法 :应用美能达CS 32 1便携式色差仪测试SY 1硅橡胶不同厚度 ( 0 .5～ 10mm )时在标准黑、白板上的色差值 ,利用对数回归方程计算出当△E =1.5时SY 1硅橡胶的厚度。结果 :SY 1硅橡胶的无限光学厚度值 (△E =1.5时 )为 7.60mm。结论 :当覆盖赝复体内部固位支架表面上的硅橡胶厚度小于无限光学厚度时 。

Objective: To find out the infinity optical thickness of SY-1 silicone elastomers when color difference(△E) is equal to 1.5 . Methods: Silicone elastomer samples with thickness from 0.5 mm to 10 mm of SY-1 silicone elastomer were measured by CIE-1976-L *a *b * relative to CIE source against a white and a black background by using Minolta colorimeter . Color difference was calculated as △E=[(△L *) 2+( △a *) 2+(△b *) 2] 1/2 . The infinity optical thickness of SY-1 silicone elastomer when △E=1.5 was calculated by regression formulation. Result: When △E was equal to 1.5, the infinity optical thickness of SY-1 silicone elastomer was 7.60 mm. Conclusion: In order to get ideal effect the supports should be treated with colorant when the thickness of silicone elastomer covering the surface of supports in maxillofacial prostheses is thinner than 7.60 mm.