Tightening screws in bone structures

摘要

The method involves using a controllable screw driving system to detect the starting torque and rotation angle. The maximum starting torque is estimated according to an algorithm, and when this is reached, a gradient process is started with the cutoff condition gradient DELTA M/ DELTA eta is less than or equal to 0, where the gradient is formed from the differential quotients of the starting torque/angle characteristic curve. An Independent claim is included for a device for tightening screws.