[Reverse prosthesis and os acromiale or XXXX ].

@entity1 @entity571 @entity5122 @entity174 @entity86 @entity158 @entity1642
PURPOSE OF THE STUDY: We reviewed cases of @entity1642 or os acromiale among a consecutive series of 240 reverse prostheses implanted between 1995 and 2003. MATERIAL AND @entity1 : Ten @entity1 presented os acromiale, ten @entity174 , and one nonunion of the scapular spine. The reverse prosthesis was implanted via a deltopectoral approach with no specific procedure on the acromion. There were 17 @entity1 and four @entity1 , mean age 72 years. The dominant side was involved for 70%. The prosthesis was indicated for excentered @entity5122 (n=14), massive rotator cuff tears without @entity571 (n=5), and failure of a hemiarthroplasty (n=2). Seventeen @entity1 were reviewed with more than two years follow-up. RESULTS: 87.5% of the acromial lesions became dislocated postoperatively due to the traction of the deltoid. There was no significant difference between os acromiale and @entity1642 . The acromial displacement did not compromise the objective outcome since the Constant score was comparable to that obtained in 179 cases with no acromial lesion reviewed with the same follow-up. Unlike these later shoulders, there were two cases of scapular spine fracture postoperatively, leading to poor function ( @entity158 and motion scores less than the global score). CONCLUSION: Acquired or congenital acromial lesions are not a contraindication for reverse prosthesis. @entity86 of the scapular spine is less well tolerated and may required revision for osteosynthesis.
