高温高压灭菌对加成型硅橡胶印模尺寸稳定性及细节再现性的影响  

Influence of autoclave sterilization on dimensional stability and detail reproduction of 5 additional silicone impression materials

作　　者：许桐楷[1] 孙志辉[1] 江泳[1] 

机构地区：[1]北京大学口腔医学院·口腔医院综合治疗二科,100081

出　　处：《中华口腔医学杂志》2012年第3期182-185,共4页Chinese Journal of Stomatology

摘　　要：目的 探讨高温高压灭菌处理对加成型硅橡胶印模尺寸稳定性及细节再现性的影响,以期为临床应用提供参考.方法 采用5种加成型硅橡胶,以ISO 4823标准金属模具制取印模,对印模进行高温高压灭菌（135℃,212.8 kPa）25 min,灭菌前后用测量显微镜测量标志线,评价印模的尺寸稳定性和细节再现性.结果 高温高压灭菌前后5组试件表面标志线的线性变化率绝对值均小于0.8％；每种加成型硅橡胶印模灭菌处理前后表面标志线长度的差异均无统计学意义（P＞0.05）.灭菌前后5组试件表面均可观察到完整长度的标志线.结论 5种加成型硅橡胶印模均可耐受高温高压灭菌处理,灭菌处理对其细节再现性和尺寸稳定性没有显著影响.Objective To evaluate the dimensional stability and detail reproduction of five additional silicone impression materials after autoclave sterilization. Methods Impressions were made on the ISO 4823 standard mold containing several marking lines,in five kinds of additional silicone. All the impressions were sterilized by high temperature and pressure （135 ℃,212.8 kPa） for 25 min. Linear measurements of pre-sterilization and post-sterilization were made with a measuring microscope. Statistical analysis utilized single-factor analysis with pair-wise comparison of mean values when appropriate.Hypothesis testing was conducted at alpha =0.05.Results No significant difference was found between the pre-sterilization and post-sterilization conditions for all locations,and all the absolute valuse of linear rate of change less than 8%.All the sterilization by the autoclave did not affect the surfuce detail reproduction of the 5 impression materials.Conclusions The dimensional stability and detail reproduction of the five additional silicone impression materials in the study was unaffected by autoclave sterilization.

关 键 词：灭菌 弹性聚硅酮类 尺寸稳定性 细节再现性 

分 类 号：R187[医药卫生—流行病学]