Sleeve type osteotomy segment diaphysis prosthesis

Abstract

The invention discloses a sleeve type osteotomy segment diaphysis prosthesis, and belongs to the field of medical equipment. The sleeve type osteotomy segment diaohysis prosthesis comprises a first prosthesis, a second prosthesis and a patch. The first prosthesis comprises an intramedullary stalk a and a connecting block. The lower end of the intramedullary stalk a is fixedly connected with the upper end of the connecting block, the lower end of the connecting block is provided with a blind hole, and the diameter of the connecting block is greater than the diameter of the intramedullary stalk a. The second prosthesis comprises an intramedullary stalk b and a plug matched with the blind hole, the upper end of the intramedullary stalk b is fixedly connected with the lower end of the plug, the side wall of the connecting block is provided with a gap matched with the patch, the gap is communicated with the lower end of the connecting block and the blind hole, the patch is a trapezoid, and the area of the back face of the trapezoid is greater than the area of the front face. By the adoption of the connecting block, no thread fixation is needed, and the service life is prolonged; the design of the gap and the patch can reduce a pull-apart distance between two diaphysis, the difficulty of operation is reduced, and at the same time, the fixation strength is increased.

Description

technical field [0001] The invention relates to a medical device, in particular to a sleeve-type osteotomy bone stem prosthesis. Background technique [0002] The bone prosthesis of the osteotomy segment is usually fixed and connected laterally by screws. However, the backbone is subject to large compressive stress and bending moment, which easily destroys the thread, so that the two prostheses are separated from each other, causing serious damage to the patient. Contents of the invention [0003] The present invention aims to provide a sleeve-type osteotomy segment backbone prosthesis, which adopts the form of connecting blocks, does not need to be fixed by screws, and has a long service life; the design of the gap and the patch can reduce the distance between the two segments of the backbone and reduce Increase the fixation strength while making minor surgery difficult. [0004] In order to achieve the above object, the technical scheme adopted in the present invention ...

AI Technical Summary

Problems solved by technology

[0002] The backbone prosthesis of the osteotomy segment usually uses screws to fix and connect the two prostheses in the lateral direction. However, the backbone is subject to large compressive stress and bending moment, which is easy to damage the thread, so that the two prostheses are separated from each other, causing serious damage to the patient.

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