Due to the aging population with poor bone quality the frequency of complex proximal humerus fractures increases. An operative reconstruction and internal fixation is very challenging and is not always possible. Secondary impaction, screw perforations and humeral head necrosis is a common complication. The use of a Reverse Total Shoulder Arthroplasty in the elderly after trauma is a promising alternative. The present multicenter study retrospectively analyzes our long-term experience of reverse total shoulder arthroplasty as a primary treatment in this patient population regarding pain, range of shoulder motion, subjective shoulder value, the constant score, scapular notiching and signs of loosening. Background: Anatomic reduction and stable internal fixation of complex proximal humeral fractures in the elderly is challenging. Secondary displacement, screw perforation, and humeral head necrosis are common complications. The outcome of hemiarthroplasty is unpredictable and strongly dependent on the uncertain healing of the greater tuberosity. This multicenter study retrospectively analyzes the midterm results of primary reverse total shoulder arthroplasty for the treatment of acute, complex fractures of the humerus in an elderly population. Methods: Fifty-two shoulders in 51 patients with a mean age of 77 years treated with reverse total shoulder arthroplasty for an acute, complex fracture of the proximal humerus were clinically and radiographically analyzed after a mean follow-up period of 35 months (range, 12-90 months). Results: There were no intraoperative complications. Revision surgery was performed in 4 shoulders. At final follow-up, the absolute and relative Constant scores averaged 62 points (range, 21-83 points) and 86% (range, 30%-100%), respectively, with a mean Subjective Shoulder Value of 83% (range, 30%-100%). Of the patients, 92% rated the treatment outcome as excellent or good. Patients with a resected or secondarily displaced greater tuberosity had an inferior clinical outcome to those with a healed greater tuberosity.
Conclusion:The midterm clinical results are predictably good, with low complication rates and a rapid postoperative recovery of painfree everyday function. If secondary displacement of the greater tuberosity occurs, revision surgery may warrant consideration in view of potential improvement of ultimate outcome. Level of evidence: Level IV; Case Series; Treatment Study