Pratt L H, Smith D G, Thornton R H, Simmons J B, Depta B B, Johnson R B
Department of Diagnostic Sciences, University of Mississippi School of Dentistry, Jackson 39216-4505, USA.
J Dent. 1999 Mar;27(3):247-8. doi: 10.1016/s0300-5712(98)00053-0.
The effectiveness was investigated of methods for the preparation of dental handpieces prior to sterilization procedures utilizing ethylene oxide (ETO) gas. The handpieces were cleaned using either a forced-air purging unit (group 1) or by flushing with air and water from the dental unit (group 2). They were inoculated with either Bacillus subtilis or Streptococcus mutans. After exposure to either steam or ETO gas, the handpieces were flushed with saline and the viability of recovered bacteria assessed. No viable bacteria were recovered from group 1 handpieces treated with either ETO gas or steam. However, viable S. mutans were recovered from group 2 handpieces following exposure to ETO gas. Thus, the use of a high-pressure forced-air purging unit may be required for the reliable sterilization of dental handpieces by ETO gas, as viable S. mutans could be recovered from untreated handpieces exposed to ETO gas.
研究了在使用环氧乙烷（ETO）气体进行灭菌程序之前，牙科手机的制备方法的有效性。使用强制空气吹扫装置（第1组）或通过牙科设备用空气和水冲洗（第2组）来清洁手机。它们接种了枯草芽孢杆菌或变形链球菌。在暴露于蒸汽或ETO气体后，用盐水冲洗手机，并评估回收细菌的活力。用ETO气体或蒸汽处理的第1组手机未回收活细菌。然而，暴露于ETO气体后，从第2组手机中回收了活的变形链球菌。因此，对于通过ETO气体可靠地对牙科手机进行灭菌，可能需要使用高压强制空气吹扫装置，因为从暴露于ETO气体的未处理手机中可以回收活的变形链球菌。
