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1.前言提高牙钻转速,改善切削性能,减少临床治疗时病者的痛苦,这是牙钻发展的主要趋向。目前国外已广泛采用40～45万转/分空气轴承涡轮牙钻,代替滚动轴承涡轮牙钻。装有空气轴承的牙钻机与装有微型高速滚珠轴承的牙钻机相比具有如下特点: 1.牙钻刀的转速快,工作时病人还来不及感到疼痛,切削即已完毕(切削速度远远快于神经的传递速度)。
1. Foreword To improve the dental drill speed, improve the cutting performance and reduce the suffering of patients during clinical treatment, which is the main trend of development of dental drills. At present, foreign countries have been widely used 40 ~ 450000 rev / min air bearing turbine tooth drill, instead of rolling bearing turbine teeth drill. Compared with a dental drill equipped with miniature high-speed ball bearings, the dental drill equipped with air bearing has the following features: 1. Drill teeth rotate at a fast speed, and the patient can not feel pain during the work time. The cutting is finished (the cutting speed is far faster In the nerve transmission speed).