Patent ID: 7824428
Filing Date: 2010-11-02
Classification: A61B

Abstract:
1. A system to be used with an implanting tool comprising a tip part, the system having a longitudinal axis, the system comprising: a polymeric bone fixation screw comprising a head, the polymeric bone fixation screw being concentric with the longitudinal axis of the system, an adapter comprising a first part comprising a recess configured to receive the tip part of the implanting tool, the first part being concentric with the longitudinal axis of the system, and the first part comprising a first element, a shaft and ridges on a periphery of the shaft, a second element comprising a counterpart to the first element, the counterpart comprising a cavity configured to receive the ridges of the first part, the counterpart further comprising bending walls separated by at least one slot, and the first element and the second element are configured to be connected to each other with a torque limiting junction having a first maximum torque in a first torsional direction when the polymeric bone fixation screw is screwed in and a second maximum torque in a second torsional direction when the polymeric bone fixation screw is screwed off, and wherein the second maximum torque of the torque limiting junction is greater than the first maximum torque, thus allowing the removal of the polymeric bone fixation screw from its position.