Deng Xiao-hong, Sun Zheng, Su Jing, Qiao Hong, Xiao Xiao
Center of Disease Prevetion and Control of Beijing, Beijing 100013, China.
Zhonghua Yu Fang Yi Xue Za Zhi. 2006 Jul;40(4):285-9.
To investigate the effects on performances of high-speed dental handpieces subjected to autoclaving.
The method of trial used to evaluate the effect of autoclaving included that ten chemical and ten biological indicators were arranged in each trial group being set by one sort of temperature and sterilization time. The range of temperature was from 100 degrees C to 134 degrees C and the sterilization time was from 1 to 45 minutes. The reliability of autoclaving was evaluated by the result of chemical indicator and the endospores of Bacillus stearothermophilus subjected to autoclaving. Ten newly imported and ten new domestic dental handpieces in two different brands were used to carry out this trial. The effects produced by autoclaving on performances of dental handpieces subjected to different type autoclaves were evaluated by some parameters.
The eligible outcome in killing test of the 221 sterilized dental handpieces proved that the sterilization effect of autoclaving on dental handpieces was reliable. The chemical indicators showed that under the condition of 121 degrees C it needed 20 minutes to reach sterilization standard in the inner package and only 15 minutes on the outer package, and under the condition of 134 degrees C it took 4 minutes to reach sterilization standard in the inner package while only 2 minutes on the outer package. This outcome proved that material with package was more time-consuming than that without package during autoclaving. Autoclaving has positive effects on the performance of dental handpieces, while the autoclave with less-time full sterilization cycle has less effect on it. The performance of dental handpieces sterilized by the autoclave with 6-minute full sterilization cycle might be restorable within certain times of sterilization cycle.
The sterilization effect of autoclaving is reliable. In order to reduce the influence on the performance of dental handpieces subjected to autoclaving, it should be reasonable to use the autoclave by which a full sterilization cycle might take less time and no use of package.
研究高压蒸汽灭菌对高速牙科手机性能的影响。
用于评估高压蒸汽灭菌效果的试验方法包括，在由一种温度和灭菌时间设定的每个试验组中安排十个化学指示剂和十个生物指示剂。温度范围为100℃至134℃，灭菌时间为1至45分钟。通过化学指示剂的结果以及经高压蒸汽灭菌的嗜热脂肪芽孢杆菌的芽孢来评估高压蒸汽灭菌的可靠性。使用两个不同品牌的十支新进口和十支新国产牙科手机进行该试验。通过一些参数评估高压蒸汽灭菌对不同类型高压灭菌器处理的牙科手机性能产生的影响。
221支灭菌牙科手机的杀灭试验合格结果证明，高压蒸汽灭菌对牙科手机的灭菌效果可靠。化学指示剂显示，在121℃条件下，内包装达到灭菌标准需要20分钟，外包装仅需15分钟；在134℃条件下，内包装达到灭菌标准需要4分钟，外包装仅需2分钟。该结果证明，高压蒸汽灭菌期间有包装的材料比无包装的材料更耗时。高压蒸汽灭菌对牙科手机的性能有积极影响，而全灭菌周期时间较短的高压灭菌器对其影响较小。经6分钟全灭菌周期的高压灭菌器灭菌的牙科手机性能在一定次数的灭菌周期内可能会恢复。
高压蒸汽灭菌的灭菌效果可靠。为减少高压蒸汽灭菌对牙科手机性能的影响，合理使用全灭菌周期可能较短且不使用包装的高压灭菌器是合理的。
