Clinical and radiologic outcomes of XXXX radial head prosthesis: midterm results.

@entity1 @entity158 @entity174 @entity24933
BACKGROUND: The modular @entity24933 (MoPyC) radial head prosthesis (Tornier, Saint-Ismier, France) is a monoblock modular radial head prosthesis. This study assessed midterm outcomes after implantation of the prosthesis. MATERIALS: A retrospective study was conducted of a consecutive cohort of 65 @entity1 who underwent radial head replacement with the MoPyC prosthesis from January 2006 to April 2013. Indications were @entity174 , early or late failures from orthopedic or fixation treatments, and revisions after another implant. @entity1 were observed for >2  years for range of motion, @entity158 , and stability; function by the Mayo Elbow Performance Score (total score, 100) and grip strength were assessed. Quality of stem implantation, bone resorption around the neck, and periprosthetic lucency were noted and quantified on radiographs. Capitellum shape and density as well as humeroulnar aspect (river delta sign) were evaluated. Complications and revision procedures were noted. RESULTS: We evaluated 52 of 65 @entity1 (mean follow-up, 46      20  months; range, 24-108). The Mayo Elbow Performance Score was 96      7; @entity158 score, 42      7/45; and motion score, 18      2/20. Function and stability were excellent. Radiology revealed 92% of @entity1 with cortical resorption around the neck without mechanical failure. Bone resorption was mostly anterior and lateral; it resolved within the first year and thereafter was stable. Eight @entity1 underwent revision surgery for stiffness. No implant failures were noted. CONCLUSION: Results of the MoPyC radial head prosthesis appear to be satisfactory. Bone resorption around the neck (stress shielding) is frequent and stable after 1  year and does not impair stem fixation. The MoPyC prosthesis appears to be a reliable solution for replacing the radial head.
