不同方法消毒口腔高速手机效果的比较研究

目的探讨不同方法消毒口腔高速涡轮手机的效果.方法将90支使用后的口腔高速涡轮手机随机分为1、2、3三个消毒组,分别采用2%戊二醛溶液擦拭浸泡30 min、环氧乙烷气体消毒60 min及预真空高压蒸汽消毒10 min的方法消毒;消毒前、后对手机表面及其内部水、气管腔采样进行细菌学检测.结果三组消毒后手机表面灭菌率分别为99.99%、100.00%和100.00%.手机内部水、气管腔冲洗液细菌检测2%戊二醛溶液消毒灭菌率为31.96%,环氧乙烷为100.00%,预真空高压蒸汽灭菌法为100.00%.结论高压蒸汽灭菌法消毒手机耗时短、效果好,可作为口腔高速手机消毒的首选方法.

Comparison of Germicidal Efficacy of Different Methods in Sterilizing Dental High-speed Handpieces

Objective To study the efficacy of three sterilizing methods on dental high-speed handpieces. Methods Nine-ty clinically used handpieces were randomly divided into three groups. They were separately sterilized by cieaning with and immersion in 2% glutaral solution, sterilization with ethylene oxide gas and for vacuum high pressure sterilization. Before and after the sterilization, the samples of flushing water were collected from the air and water chan-nels of the handpieces for bacteriological examinations. Results The bactericidal rates for the surface of handpieces after the sterilization with the three techniques were 99. 99% ,100. 00% and 100. 00% , respectively. The bactericidal rate of the air and water channels after sterilization with glutaral solution was 31. 96% and the rates for the other two methods were both 100. 00%. Conclusion The high pressure sterilization is the most effective technique for the sterilization of handpieces.