不同高压蒸汽灭菌参数对牙科高速手机性能的影响

目的 探讨不同高压蒸汽灭菌参数对牙科高速手机使用性能的影响,为临床选择合适的灭菌程序提供依据.方法 采用正交实验方法,按高压灭菌的三种参数即灭菌温度(132℃、134℃、136℃),灭菌持续时间(4min、5min、6min)和干燥时间(10min、15min、20min)通过三因素三水平将45把全新的牙科高速手机分成9组,分别对其进行灭菌,记录8个月内每组手机的维修次数并对三种因素进行析因分析.结果 8个月期间,每把手机共灭菌1060次,变量A(灭菌温度)P<0.01和变量B(持续时间)P<0.01,对因变量X(维修次数)差异具有统计学意义,变量C(干燥时间)P>0.05则差异无统计学意义.结论 高压灭菌温度及持续时间对牙科高速手机的性能有影响,干燥时间对手机的性能影响不明显.

The influence of different autoclaving steralization parameters on the performance of dental handpieces

Objective To discuss the influence of different autoclaving on performance of dental handpieces to provide evidence for the clinical choices of proper dental instrument sterilization procedures.Methods Orthogonal ex-periment method was adopted. 45 totally new high-speed dental handpieces were randomly divided into 9 groups accord-ing to the three factors of autoclaving, including sterilizing temperature (132 ℃, 134 ℃, 136 ℃),sterilizing dura-tion (4 min, 5 min, 6 min,) and desccination time (10 min, 15 min, 20 min) by the method of three factors-lev-els. All these high-speed dental handpieces were sterilized, and number of maintenance in 8 months was recorded and the three factors was analyzed.Results Each handpiece experienced 1 060 times of autoclaving in 8 months.Variable A (sterilizing temperature) P<0.01 and Variable B (duration time) P<0.01 influenced Dependent Variable X (mainte-nance frequency),and the differences were statistically significant. There were no statistical significances of Variable C (desiccation time) P>0.05. Conclusion Autoclaving temperature and duration time had impact on the performances of dental handpieces.Desiccation time showed less obvious effect on performances of handpieces.