Shoulder joint cavema side prosthesis

Abstract

The invention discloses a glenoidal cavity lateral prosthesis, which is characterized by the following: forming the outline of the prosthesis as kidney shape; arranging screw hole on the prosthesis to fix screw; setting the thickness of the prosthesis thin layer less than 5mm; choosing the screw as double tabernacle screw; setting the tabernacle screw as hollow structure; arranging the screw holeon each one-third position of the surface of the prosthesis; designing the inner core as hexagon; setting the thickness of the thin layer less than 5 mm when using; decreasing loss of subchondral bone on the one side of the prosthesis.

Description

technical field [0001] The invention relates to a medical device, in particular to a shoulder glenoid prosthesis. Background technique [0002] Since the amount of joint bone on the glenoid side of the shoulder joint is relatively small, and the scapula is particularly thin, its special structure has high adaptability to the fixation method and anatomy of the glenoid part of the shoulder joint prosthesis. requirements. However, there are some problems in many existing design schemes. For example, when fixing the glenoid prosthesis, in order to achieve sufficient fixation, it is at the expense of a large amount of glenoid bone loss. As a result, the loosening rate of the prosthesis is very high. As a result, revision surgery will be performed soon; in some cases, the anatomical adaptability of the glenoid prosthesis is not enough to bear the force on the humerus side, or a force that does not conform to biodynamics is generated, resulting in early appearance of the glenoid p...

AI Technical Summary

Problems solved by technology

[0003] Although the existing glenoid prosthesis is fixed with a screw hole on both sides of the metal support, the specific position of the screw hole is not limited. In the operation process, there is no uniform standard, and the defects of large randomness and unstable fixation

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