两种压力蒸汽灭菌器多次高压灭菌对镍钛锉表面形貌影响的AFM研究

目的：评价两种高压灭菌法对镍钛根管锉表面形貌的影响。方法：选择6支同一批次手动Protaper镍钛根管锉,分为两组,分别用两种灭菌方法经10次灭菌程序后在原子力显微镜（AFM）下观察,从距尖端6 mm范围内的20个不同的点,评价样本的粗糙度均方根,将此6支锉未经消毒时设为对照组。结果：所有参数均显示经预真空压力蒸汽灭菌器消毒组镍钛锉粗糙度大于对照组,而快速压力蒸汽灭菌器消毒组与对照组相比粗糙度相差不明显。结论：在保证灭菌效果的前提下,从延长器械使用寿命考虑,快速高压蒸汽灭菌是镍钛锉理想的灭菌方式。

The effect of two different multiple autoclave cycles on surface of topography of rotary nickel-titanium (Ni-Ti) files by atomic force microscopy

Objective:To evaluate the effect on the surface of nickel-titanium files after two type of multiple autoclave cycles.Method:Six Ni-Ti files were observed by atomic force microscopy,the same files were used as control before any cycles.The six files were observed after 10 rapid autoclaving steriliazation cycles and 10 prevacume autoclaving sterilization cycles respectively,20 different points were measured as root mean square.The data were tested by spss test.Result:All topographic parameters were higer comp...