Device to assist with the placement of screws in bone tissue and instrument applying said device, in particular for performing osteosynthesis of bone fragments

摘要

The invention relates to a device to assist with the placement of screws in bone tissue, characterised in that said device includes: - an elongate hollow body (1) comprising: - a proximal portion (2) enabling the attachment thereof to any rotating device, - a distal portion provided with a milling cutter (3) for making the recess for receiving the screw heads, - a central portion provided with a longitudinal window (4) with grading (5) and, - a drill spindle (6) with a diameter enabling the axial sliding thereof into the bore of the hollow body (1) and comprising, in the intermediate portion thereof, a marking means (7) suitable for being positioned opposite the window (4) of said body; the proximal portion (2) of the body (1) being arranged to enable either simultaneous rotation of the body (1) and the spindle (6) housed in the latter, or rotation of only the body.