Cruciate ligament rebuilding hollow trephine

Abstract

A cruciate ligament rebuilding hollow trephine belongs to medical apparatuses and instruments. A bone residue removing rod is arranged in an axial center hole of the trephine in an insertion mode, and the bone residue removing rod and the trephine are positioned as a whole through the fastening matching of a fastening screw mounted on the bone residue removing rod with an axial sliding hole on the side wall of the trephine. A piston is mounted at the front end of the bone residue removing rod in the axial center hole of the trephine. Sawteeth of the trephine are arranged on the front side end surface of the trephine. Kirschner wires are inserted into the bone residue removing rod, the piston and the axial center hole of the trephine sequentially, and the outer surfaces of the Kirschner wires match with the inner surfaces of the bone residue removing rod, the piston and the axial center hole in a contact mode, so that the Kirschner wires can be positioned radially. The cruciate ligament rebuilding hollow trephine is simple in structure, high-quality and effective in bone-side tunnel establishment and simple in postoperation bone residues removing.

Description

technical field [0001] The invention belongs to medical equipment, and mainly relates to a hollow trephine used for cruciate ligament reconstruction of tibia and femur in orthopedic surgery. Background technique [0002] When the existing medical cruciate ligament reconstruction is used to establish the lateral tunnel of the tibia, Kirschner wires and hollow drills are often used. First, the Kirschner wires are drilled through the guide, and then guided by the Kirschner wires, a hollow drill with the same diameter as the graft material is used. The tibial tunnel is made, but the bone debris and residual soft tissue around the opening of the bone hole in the joint are often not completely removed, which is likely to cause long-term joint adhesions and affect the quality and effect of the operation. The same is true for the femoral side, and when the femoral side bone hole is made, it is easy to cause cortical bone defect at the back of the femur. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0002] When the existing medical cruciate ligament reconstruction is used to establish the lateral tunnel of the tibia, Kirschner wires and hollow drills are often used. First, the Kirschner wires are drilled through the guide, and then guided by the Kirschner wires, a hollow drill with the same diameter as the graft material is used. The tibial tunnel is made, but the bone debris and residual soft tissue around the opening of the bone hole in the joint are often not completely removed, which is likely to cause long-term joint adhesions and affect the quality and effect of surgery

The same is true for the femoral side, and when the femoral side bone hole is made, it is easy to cause cortical bone defect at the back of the femur

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