Abstract

in the elderly patient population, where fracture comminution, osteoporotic fractures, and associated arthritis or rotator cuff pathologies dominate, metadiaphyseal proximal humeral fracture is a challenging subset of fractures to treat. This study reports on cementless long-stem reverse total shoulder arthroplasty (RTSA) as primary treatment of metadiaphyseal proximal humeral fractures in elderly patients. Between January 2018 and October 2021, 22 consecutive patients sustained proximal humerus fractures with metadiaphyseal extension and underwent surgery with cementless long-stem RTSA. Patients older than 60 years with minimum 1 year of clinical and radiographic follow-up were included. Patient demographics, range of motion, and patient reported outcomes [Visual Analog Scale (VAS) pain scale, Simple Shoulder Test (SST), Subjective Shoulder Value (SSV), and American Shoulder Elbow Surgeon (ASES) scores] were retrospectively collected. Postoperative X-rays were evaluated for fracture and tuberosity union. There were 14 eligible patients with a median age of 71 years (range 61-91 years) and a median 13 months follow-up. At final follow-up, the median active elevation was 120° (range 80°-150°), external rotation was 40° (range 0°-50°), and internal rotation was 40° (range 0°-80°). Median VAS was 2 (range 0-8), SST was 71% (range 33%-92%), SSV was 78% (range 20-90%), and ASES was 73 (range 17-90). All patients exhibited radiographic union. There were five minor complications in three patients: postoperative neuropathy, tuberosity nonunion, scapula notching, and proximal humeral stress shielding. Cementless long-stem RTSA is a viable alternative to primary fracture fixation in the elderly patient population with metadiaphyseal proximal humerus fractures.

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