拆冠器对双尖牙全冠及基牙冲击力实验研究

目的：对拆冠器拆冠操作过程进行动态测试及分析，为正确安全使用拆冠器提供力学依据。方法：应用振动测试技术，通过ＣＲＡＳ振动、冲击、噪声采集处理系统采集处理拆冠操作时冲击力产生的瞬时弹性波，通过计算机分析计算得出测试结果。结果：全冠、基牙所受冲击力２１．４１±５．１８公斤、作用时间１．５８±０．１０毫秒。冲击力越大，拆冠器对实验全冠、基牙作用时间就越长，反之则越短。结论：拆除双尖牙全冠时，冲击力的方向应该尽量与牙冠长轴平行，大小为２４．５９±５．９８ｋｇ较为适合。

The experimental research of the wallop of crown remover to the abument tooth and the full crown of premolar

Objective: To test and analyze the wallop of crown,remover and to provide the mechanical gist for using crown remover right and safely. Methods: with the CRAS collection and transaction system of vibration, shock and noise gathering and transacting instantaneous spring waves made by the wallop crown of remover in the operation of crown, remove inputting the data into computer and analyzing and computing ,then educing the test results. Results: the wallop to tooth and crown is 21.41±5.18kg, the effect time is 1.58±0.10ms. the bigger is the wallop,the longer is the effect time of crown remover to tooth and crown, vice versa. Conclusion: when removing the bicuspid full crown, the direction of wallop must be parallel to the long axis of full crown to the best of its abilities. 24.59 ± 5.98kg is the most suitable force.