3种清洗方法对牙科手机机械性能的影响

目的:比较不同清洗方法对牙科手机机械性能的影响,探讨最佳清洗方法。方法:将全新牙科手机120支随机分成A、B、C3组,A组:采用纯手工的方法清洗;B组:采用超声清洗机清洗;C组:采用热清洗机清洗,1年后对3种不同方法清洗后的牙科手机机械性能进行比较分析。结果:A组手机转速、夹持力及锈蚀损坏都是最严重的,C组次之,而B组清洗的牙科手机损坏是最轻的。结论:采用超声波清洗机(B组)能较好地维护牙科手机的机械性能,建议推广使用。

Effect On mechanical functions of high-speed dental handpieces by different cleaning methods

Objective：To explore the best cleaning method through comparing the effect on mechanical function of high-speed dental handpieces by different cleaning methods.Methods：One hundred and twenty new high-speed dental handpieces were divided into A,B and C groups randomly.Dental handpieces in group A were cleaned by manual method;ultrasonic cleaning system and auto-heating cleaning unit were used in Group B and C.Mechanical functions of high-speed dental handpieces were tested one year later.Results：The mechanical functions including rotation speed,clamping force and tarnishing of high-speed dental handpieces in group A were damaged most severely,then group C,and dental handpieces in group B were damaged most lightly.Conclusion：The use of ultrasonic cleaning machine could better maintain mechanical functions of dental handpieces.