| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device for fastening a dental implant which prevents slippage during manual operation. <P>SOLUTION: The fastening device includes a torque wrench W and a slippage detector D. The torque wrench W is provided with a fastening part, a head part 21 having the fastening part 10, a wrench body 20 having a handle part 22, and a load cell 30 detecting fastening torque. The slippage detector D is provided with: a slippage determining part 52 that samples the amount of change in fastening torque at every predetermined time t, successively compares the amount of change in fastening torque for a previous predetermined time t with the amount of change in fastening torque of the predetermined time period t immediately thereafter, and determines whether or not the latter amount of change is smaller than the former amount of change; and a buzzer 93 that warns that the fastening condition is on the verge of slippage when the slippage determining part 52 determines that the latter amount of change is smaller than the former amount of change. <P>COPYRIGHT: (C)2012,JPO&INPIT |
