[ @entity603 of the wrist joint following XXXX replacement of the carpal bones].

@entity1 @entity174 @entity262 @entity910 @entity603 @entity6661 @entity2070 @entity1346
The authors report on six @entity1 in whom an aggressive @entity603 of the wrist and erosion of the adjacent bones has developed after insertion of Silastic implants in the region of the carpus. @entity262 , dislocation or @entity174 of the prosthesis was not present. In surgical revision, the prosthesis shows changes in form and rough surfaces. The synovial membrane is massively thickened and highly inflamed with @entity2070 formation; the adjacent bone showed cartilage loss and fragmentations. Light and electron microscopic investigations of the synovial membrane and the bone show giant cells with @entity1346 particles. We consider that compression, shearing forces as well as @entity910 are to be considered primarily as causes of @entity6661 . Other factors such as age, profession and location hardly play any role. Prostheses which are too large, the presence of osteophytes and structural loosening of the carpal bones are avoidable risks. After removal of the prosthesis and the synovial membrane, there is rapid healing. Subsequent arthrodesis also heals without problems.
