Assembled acetabular prosthesis, mounting method thereof, and bone defect grinding file device matched with the acetabular prosthesis

Abstract

The purpose of the invention is to provide an assembled acetabular prosthesis, a mounting method thereof and a bone defect grinding file device matched with the acetabular prosthesis, which can effectively improve the stability and the service life of the acetabular prosthesis after mounting. The assembled acetabular prosthesis of the invention is composed of an acetabular outer cup and a reinforcing block which is assembled and fixed on one side of the acetabular outer cup. The bone defect file grinder matched with the assembled acetabular prosthesis comprises a handle, a distal end of the handle is detachably mounted with an acetabular adapter, and one side of the acetabular adapter is provided with a notch. The handle is fixed with a rotating shaft sliding sleeve, the rotating shaft sliding sleeve is provided with a rotating shaft through hole on one side of the handle, the rotating shaft through hole is installed with a rotating shaft which can move freely along the axial directionof the rotating shaft through hole, and the rotating shaft is parallel to the handle. The proximal end of the acetabular fitting part is provided with an avoiding part, the rotating shaft extends through the avoiding part to the notch, the distal end of the rotating shaft is detachably mounted with a grinding file head, and the proximal end of the rotating shaft is provided with a connecting partfor connecting with the driver to transmit the torque of the driver.

Description

technical field [0001] The invention belongs to the field of medical technology, and in particular relates to a modular acetabular prosthesis used in artificial total hip arthroplasty or primary replacement, an installation method thereof, and a matching bone defect rasp. Background technique [0002] In total hip arthroplasty or revision, large bone defects on the acetabular side will affect the stability of the acetabular prosthesis, and metal reinforcement is a common method to deal with acetabular bone defects. The traditional reinforcing block is a standard shape, which is implanted separately from the acetabular cup, and often cannot fully fit the shape of the bone defect, which is not conducive to long-term stability; and the reinforcing block and the acetabular cup are not fixedly connected. The gap needs to be filled with bone cement, and fretting friction will produce harmful wear debris, which may accelerate the wear of the prosthesis and cause osteolysis, reducin...

AI Technical Summary

Problems solved by technology

The traditional reinforcing block is a standard shape, which is implanted separately from the acetabular cup, and often cannot fully fit the shape of the bone defect, which is not conducive to long-term stability; and the reinforcing block and the acetabular cup are not fixedly connected. The gap needs to be filled with bone cement, and fretting friction will produce harmful wear debris, which may accelerate the wear of the prosthesis and cause osteolysis, reducing the life of the prosthesis

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