Split type anatomic form radial head joint prosthesis

Abstract

The invention discloses a split type anatomical form radial head joint prosthesis which comprises a small radial head and a radial bone marrow needle, the radial bone marrow needle comprises a connector and a nail body, the connector is connected with the nail body, the axis of the connector and the axis of the nail body intersect, and the axes of the connector and the nail body are located in the same plane. The included angle between the axis of the connector and the axis of the nail body is consistent with the anatomical form of the radial head of a human body; the connector is rotationally connected with the capitulum radius, and the rotary connecting surface of the connector and the capitulum radius is a spherical surface. A certain included angle is formed between the axis of the connector and the axis of the nail body, so that the prosthesis is consistent with the anatomical form of the radial head of the human body; meanwhile, the connector is rotationally connected with the capitulum radius, and the rotary connecting surface of the connector and the capitulum radius is a spherical surface, so that when the prosthesis is implanted into a case individual, the connecting angle of the capitulum radius and the radial bone marrow needle can be better adjusted, the prosthesis can adapt to the individual difference of the case to the maximum extent, and the implantation success rate of the prosthesis is increased.

Description

technical field [0001] The invention relates to the technical field of orthopedic implantation instruments, in particular to a split anatomical radial head joint prosthesis. Background technique [0002] The radius is located on the lateral part of the forearm and is divided into two ends. The upper end is enlarged and called the radial head. The articular concave above the head is related to the humerus capitellum; the surrounding annular articular surface is related to the ulna; There is a raised radial tuberosity on the medial and inferior side, the radial body is biprism, and the medial border is a thin and sharp interosseous border. The lower end is concave and kyphotic, and the outer side protrudes downward, called the styloid process. The inner surface of the lower end has an articular surface, showing a ulnar notch, which is related to the ulnar head, and the lower part has the wrist articular surface and the carpal bone. In cases of natural bone defects or lesions ...

AI Technical Summary

Problems solved by technology

[0004] The above existing technical solutions are all beneficial attempts to the development of radial head prosthesis technology. The disadvantage is that in the above technical solutions, the radial head and the radial medullary needle are mostly coaxially arranged, and there is a gap with the anatomical shape of the radial head. Relatively fixed, ignoring the individual differences of cases, cannot fully meet the needs of all clinical cases

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