Bone prosthesis for maintaining joint operation in complex joints

摘要

A prosthesis for reconstructing a multibone joint such as a wrist. A patient's scaphoid is removed to create a void. The scaphoid has a plurality of adjacent bones, each of the adjacent bones comprising a surface generally facing the void. The surface of at least two of the adjacent bones is prepared by affixing a magnetic element thereto and a magnetic scaphoid implant is inserted into the void. A magnetic relationship exists between the magnetic elements and the magnetic scaphoid implant.

主权项

1. A wrist prosthesis comprising:
a magnetic implant approximating the size of a bone to be replaced; a first magnetic bone implant securable to a first bone adjacent the bone to be replaced; and a second magnetic bone implant securable to a second bone adjacent the bone to be replaced, wherein each of the first and second magnetic bone implants have a magnetic relationship with the magnetic implant, wherein the magnetic implant is a scaphoid implant approximating the size and shape of a scaphoid to be removed from a patient's wrist, the first magnetic bone implant is securable to a first bone adjacent the scaphoid to be replaced, and the second magnetic bone implant is securable to a second bone adjacent the scaphoid to be replaced, wherein the first and second magnetic bone implants each have a magnetic relationship with the scaphoid implant, wherein at least one of the scaphoid implant or the first and second magnetic bone implants comprise a magnet, and wherein the first bone and the second bone are selected from the trapezium, the trapezoid, the lunate, the capitate, and the radius.