SHOULDER PROSTHESIS FOR CENTRED SCAPULAR OSTEOARTHRITIS VERSUS SHOULDER PROSTHESIS FOR FRACTURE: COMPARISON OF HUMERAL STEM FIXATION

Purpose: The purpose of this work was to evaluate the quality of cemented humeral stem fixation. We analysed the incidence and influence of humeral lucent lines and loosening after implantation of a shoulder prosthesis as a function of aetiology (fracture versus scapular osteoarthritis) and glenoid status (total versus partial humeral prosthesis).Material and methods: This retrospective series included 1842 first-intention shoulder prostheses reviewed at mean five years (2–10). We selected patients whose initial diagnosis was fracture of the superior portion of the humerus (n=300) and centred osteoarthritis (n=767). All stems implanted for fracture were cemented. For osteoarthritis, there were 610 total prostheses and 157 simple humeral prostheses: 752 stems were cemented and 15 were implanted without cement. The Constant score and radiographic results (AP and lateral view at least) were noted.Results: For cemented stems, the incidence of radiographic lucent lines and loosening was significantly higher in...