SY-28、SY-20和MDX4-4210硅橡胶吸水率和溶解率的对比测定

Comparative study of the water sorption and solubility of SY-28、SY-20 and MDX4-4210 silicone elastomers

目的:对比SY-28、SY-20和MDX4-4210硅橡胶的吸水率和溶解率。方法:在相同条件下,测定SY-28、SY-20和MDX4-4210硅橡胶的吸水率、溶解率,对其物理性能加以评价,并进行统计学分析。结果:SY-28硅橡胶第8周的吸水率为3.112%,与MDX4-4210硅橡胶(3.012%)相似;SY-28硅橡胶第8周的溶解率为0.4401%,高于MDX4-4210硅橡胶(0.3179%)。SY-20硅橡胶第8周的吸水率和溶解率分别为3.501%,0.4756%,均高于MDX4-4210硅橡胶的吸水率和溶解率。结论:SY-28、SY-20硅橡胶能够满足赝复材料的临床要求,但仍需对材料及配方进行修改与完善,降低其吸水率和溶解率。

Objective.To compare the water sorption and solubility of SY-28,SY-20 and MDX4-4210 silicone elastomers. Method：The water sorption and solubility of three kinds of silicone elastomers were examined and evaluated under the same condition.Thirty specimens of each material were tested and data were collected at 1-8 weeks. Result： The results showed that the means of percentage about water sorption at 8 weeks was 3.112% for SY-28, and 3.012% for MDX4-4210, which showed no significant differences： the solubility at 8 weeks was 0.4401% for SY-28, which showed higher than that of MDX4-4210 （0.3179%）. The means of percentage about the water sorption and solubility at 8 weeks were 3.501% and 0.4756% for SY-20, which were higher than those of MDX4-4210 （3.012%, 0.3179%）. Conclusion： The results of this study have clinical implications because the water sorption and solubility may affect the long-term life expectancy of silicone elastomer. Based on the present study, it appears that SY-28 and SY-20 silicone elastomers are suitable for use in fabricating of clinical prostheses, but the water sorption and solubility should be improved as the prosthestic materials that often contacts with water.