Locking head screw insertion | 合法醫療器材資訊網

Lockingheadscrews.Introduction.Theholeintheplateisthreaded,andtheheadofthelockingscrewhasacorrespondingthread.

Some systems have calibrated drill bits, so the depth of the tip is indicated. As the tip of the drill bit penetrates the far cortex, the depth can be measured from the shaft of the drill bit.

The depth of the hole will depend on whether monocortical or bicortical screws are used.

No sleeve is used if self-tapping, self-drilling screws are used. These should only be used as unicortical screws. If the screw is used to drill a hole in the far cortex, it only advances slowly as it is turned, so the threads in the near cortex are stripped.