trepan for the sample of a bone core sample, provided with a guide device has the inside of the bone, removal of the core sample out of the trepan and irrigation of the bone sample.

摘要

The present invention relates to a bit for the removal of a bone core (20). The trephine comprises a tool (1) of tubular shape with circular cross section comprising an axial recess (2) which forms a reserve of reception of the core (20). The proximal end of the bit (1) is provided with a grip (3) for its driving in rotation. The trephine incorporates a device for guiding the tool (1) in the bone substance. This apparatus comprises a guide rod (4) which emerges coaxially out of the distal end of the axial recess (2) of the tool (1). The emergent part of the rod (4) constitutes a guide finger (5) of the tool (1) designed to be housed in a hole (6), previously carried out by the practitioner in the bone (7).