| 摘要 |
A tool for driving pedicel screws into a vertebra of the human spine, comprising a shaft having a handle at one end and at the opposite end having a holder for receiving a preferably ring-shaped head which is flattened on opposite sides, wherein the first clamping jaw is secured to the shaft, a second loose clamping jaw includes a lateral projection which is tiltably received by the first clamping jaw and an axially slidable actuating member is guided alaong the shaft, wherein the front end of the actuating member engages the rear end of the second clamping jaw to be axially urged towards the second clamping jaw by a thread driving means.
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