Tehran University of Medical Sciences Journal of Orthopedic and Spine Trauma 2538-2330 12 2 2026 05 18 102 6 Atharva Sharma Senior Resident, Department of Orthopedics, H.B.T Medical College and Dr R.N. Cooper Hospital, Mumbai, India Bibhas DasGupta Professor, Department of Orthopedics, H.B.T Medical College and Dr R.N. Cooper Hospital, Mumbai, India Mihir Patel Additional Professor, Department of Orthopedics, H.B.T Medical College and Dr R.N. Cooper Hospital, Mumbai, India Mahesh Shinde Assistant Professor, Department of Orthopedics, H.B.T Medical College and Dr R.N. Cooper Hospital, Mumbai, India Sanket Jethliya Senior Resident, Department of Orthopedics, H.B.T Medical College and Dr R.N. Cooper Hospital, Mumbai, India Shreyas Revankar Senior Resident, Department of Orthopedics, H.B.T Medical College and Dr R.N. Cooper Hospital, Mumbai, India Deepanshu Garg Senior Resident, Department of Orthopedics, H.B.T Medical College and Dr R.N. Cooper Hospital, Mumbai, India Rohan Bahl Senior Resident, Department of Orthopedics, H.B.T Medical College and Dr R.N. Cooper Hospital, Mumbai, India Patil Yogeshwari Medical Student, Department of Orthopedics, H.B.T Medical College and Dr R.N. Cooper Hospital, Mumbai, India Siddharth Mitra Medical Student, Department of Orthopedics, H.B.T Medical College and Dr R.N. Cooper Hospital, Mumbai, India Samreen Chunawala Medical Student, Department of Orthopedics, H.B.T Medical College and Dr R.N. Cooper Hospital, Mumbai, India Yash Singh Medical Student, Department of Orthopedics, H.B.T Medical College and Dr R.N. Cooper Hospital, Mumbai, India Singh Akanksha Medical Student, Department of Orthopedics, H.B.T Medical College and Dr R.N. Cooper Hospital, Mumbai, India 2025 10 02 2026 05 18 Background: Proximal humerus fractures are common, especially in the elderly, and often result from low-energy falls or high energy trauma in younger patients. These fractures pose a management challenge due to varied patterns and complex anatomy. While many are treated conservatively, displaced or comminuted fractures often require surgical fixation. Locking plates, particularly the proximal humeral internal locking system (PHILOS), offer stable fixation and improved outcomes, especially in osteoporotic bone. This study aims to assess the functional outcome of displaced proximal humerus fractures treated with PHILOS plating at a tertiary care teaching hospital in Mumbai, India. Methods: This prospective observational study involved 30 adults with displaced proximal humerus fractures treated with PHILOS plating. After informed consent, patients underwent surgery and standardized postoperative rehabilitation. Shoulder function was assessed using the Constant-Murley score (CMS) at 6 weeks, 3 months, and 6 months. Data were analyzed using t-tests and chi-square tests. Results were expressed as mean ± standard deviation (SD) and percentages, with significance set at P < 0.05. Results: This study included 30 patients (mean age: 52.5 years); 70% were men. Most injuries were due to road traffic accidents (RTAs) (70%), with two-part fractures being most common (60%). Radiological union occurred at 6-8 weeks in 80%, 9-12 weeks in 16.7%, and after 12 weeks in 3.3% of patients. The CMS improved significantly over 6 months (P < 0.0001). Functional outcomes were good to fair in most patients. Postoperative complications occurred in 36.67%, mainly shoulder stiffness (23.33%), followed by impingement (10%) and malreduction (3.33%). Conclusion: The PHILOS plate offers stable fixation and favorable functional outcomes in proximal humerus fractures, with timely union and improved CMS, making it an effective option despite minor complications. https://jost.tums.ac.ir/index.php/jost/article/view/721 https://jost.tums.ac.ir/index.php/jost/article/download/721/471