Fig. 8.

Case 4 (G.M.F.) after 7 years from surgery, the patient developed a massive reactivation of rheumatic disease no longer responsive to drugs, which determined a progressive failure of the carpal component with proximal migration of the screws and broke the carpal stem accompanied by pain, swelling, and functional impairment; intraoperative an extended metallosis was found but the polyethylene was in good condition with no coarse signs of wear. The carpal component was replaced and now the prosthesis shows no mobilization and is clinically silent.