The authors have requested that this preprint be withdrawn due to erroneous posting.

Introduction: Proximal humerus fractures are prevalent and widespread, accounting for 5% of all fractures, mainly in the elderly osteoporotic patients following a low-level trauma. Three-and four-part fractures represent 13 to 16% of these fractures and are generally associated with a worse prognosis. Depending on the fracture type and the patient status, several therapeutic options would be available ranging from osteosynthesis to arthroplasty. The aim of our study was to compare the functional and radiological results, as well as the complications of reverse shoulder arthroplasty and anterograde nailing when managing these fractures. Methods: A retrospective and descriptive study was conducted within the orthopedic surgery department of the Military Hospital of Instruction of Tunis, over a period of 42 months, from January 2016 to June 2019 with an average follow-up of 18 months. We included 31 cases of complex fractures of the proximal humerus in elderly patients, aged over 65 years, 16 of whom were treated by reverse total arthroplasty and 15 by antegrade nailing. Results: Our patient pool included 8 men and 23 women with a mean age of 73 years, ranging from 65 to 85. A low-energy fall was the main cause of the fractures with the dominant side being affected in 55% of cases. Four-part fractures were predominant representing 68% of the fractures. Constant and DASH scores at the last follow-up were at 68 and 24 respectively. Most patients were satisfied with the outcome of their surgeries, with an overall satisfaction rate of 87%. The complications rate was in accordance with the literature. Functional results in the group treated with reverse total shoulder arthroplasty were better with a lower complications rate. Conclusion: Reverse total shoulder arthroplasty has become an interesting surgical alternative, as the functional and anatomical results in our study were promising, while elucidating an improved quality of life for our patients. These findings have encouraged us to continue using this technique as a first-line choice for complex fractures of the proximal humerus in the elderly