Semi-radius head prosthesis structure

Abstract

The invention relates to a semi-radius head prosthesis structure which comprises a prosthesis head matched with a non-fractured radius head part, and the prosthesis head is used for being spliced withthe non-fractured radius head part to form a complete radius head. Compared with the prior art, according to the invention, the prosthesis head is matched with the non-fractured radius head part, andcan be spliced with the non-fractured radius head part to form the complete radius head; therefore, when the articular surface of the radius head part is fractured, a patient does not need to cut offthe whole radius head, the prosthesis head is used for replacing the radius head of the fracture part to be reserved as the radius head of the fracture part, the prosthesis head and the radius head are spliced into the complete radius head, iatrogenic injuries of a patient are reduced to the maximum extent, and joint integrity and joint stability can be kept.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a semiradial head prosthesis structure. Background technique [0002] The human elbow joint includes the distal humerus, proximal ulna, and radial head, among which radial head fractures account for about 5.4% of all fractures in the human body. At present, the most commonly used clinical radial head fracture classification method is the Mason classification, including: type I fracture, non-displaced fracture of the radial head; type II fracture, partial articular fracture of the radial head with displacement (including simple and comminuted fractures). Partial joint fracture); type III fracture, complete comminuted fracture of the radial head joint. Radial head arthroplasty has achieved good results in the treatment of type II and type III comminuted radial head fractures, and the medium and long-term clinical results are satisfactory. The indications for surgery are mainly ...

AI Technical Summary

Problems solved by technology

[0004] At present, since there is no hemiradial head prosthesis, when performing radial head replacement surgery for partial articular surface fractures of the radial head, it is necessary to resect the entire radial head, that is to say, including a part of the fractured radial head and a part of the unfractured radial head. Patients with fractures of the radial head joint need to resect the non-fractured part, which not only brings additional iatrogenic injury to the patient, but also has the possibility of joint instability and loosening of the radial head prosthesis after surgery.

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