Polyzois G L
School of Dentistry, University of Athens, Greece.
J Prosthet Dent. 1999 Oct;82(4):447-50. doi: 10.1016/s0022-3913(99)70032-6.
Color deterioration of silicone prosthetic elastomers affects the life expectancy of facial prostheses in a service environment.
This study investigated the color stability of 3 nonpigmented silicone elastomers (Silskin 2000, Elastosil M3500, Ideal) exposed to outdoor weathering for 1 year.
A tristimulus colorimeter was used to evaluate the color differences (DeltaE*) of the silicone elastomers every 2 months. Ten disk-shaped specimens for each material were tested. Data were analyzed with a repeated measures ANOVA and Student-Newman-Keuls test at a significance level of alpha = .05.
All silicone elastomers showed visually detectable, mean color differences (DeltaE* > 2.0), that ranged from 2.13 to 3.98. Silskin 2000 showed greater color differences (P <.05) compared with Elastosil M3500 and Ideal, which showed similar behavior (P >.05).
Outdoor exposure of silicone facial elastomers for 1 year resulted in visually detectable color differences. Duration of exposure and silicone elastomer were significant factors that affected color stability. Silskin 2000 was significantly less color stable than Elastosil M3500 and Ideal, which were not statistically significantly different from each other.
在使用环境中，硅酮假体弹性体的颜色劣化会影响面部假体的使用寿命。
本研究调查了3种未着色的硅酮弹性体（Silskin 2000、Elastosil M3500、Ideal）在户外暴露1年的颜色稳定性。
使用三色刺激色度计每2个月评估硅酮弹性体的颜色差异（ΔE*）。对每种材料的10个圆盘形样本进行测试。数据采用重复测量方差分析和Student-Newman-Keuls检验进行分析，显著性水平α = 0.05。
所有硅酮弹性体均出现肉眼可察觉的平均颜色差异（ΔE* > 2.0），范围为2.13至3.98。与Elastosil M3500和Ideal相比，Silskin 2000表现出更大的颜色差异（P < 0.05），而Elastosil M3500和Ideal表现出相似的变化趋势（P > 0.05）。
硅酮面部弹性体在户外暴露1年会导致肉眼可察觉的颜色差异。暴露时间和硅酮弹性体是影响颜色稳定性的重要因素。Silskin 2000的颜色稳定性明显低于Elastosil M3500和Ideal，而后两者之间在统计学上无显著差异。
