Abstract
Total shoulder arthroplasty has become an accepted treatment for advanced arthritic conditions of the glenohumeral joint1,3. Loosening of the glenoid component has been a complication of the procedure3,5 and, in an attempt to prevent it, a modular glenoid component has been developed. It consists of a polyethylene articular component that snaps into a metal shell that is secured to the glenoid with screws. Although similar designs of modular components have proved to be effective for total joint arthroplasty in the lower extremity, disassembly of the components after implementation has been reported2,6-8,10. We report the case of a patient who had disassembly of the glenoid component after a total shoulder arthroplasty. A sixty-eight-year-old retired man had a total arthroplasty of the right shoulder for treatment of disabling osteoarthrosis at another institution. The arthroplasty consisted of insertion of a humeral component and a metal-backed two-piece glenoid component without cement. The metal shell of the glenoid component was porous-coated and was secured to the glenoid with two screws. The operative procedure was uncomplicated and resulted in substantial relief of pain and improvement of function. Three months postoperatively, the patient had an acute onset of pain with an audible pop that occurred when the shoulder was abducted and …
Published Version
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