Assessment of Surgical Outcome in Three- and Four-Part Proximal Humerus Fracture Treated With Proximal Humerus Internal Locking System (PHILOS) Plate Versus Neer’s Prosthesis in Elderly Patients

Background: With an incidence of 50% of humerus fractures, proximal humerus fractures (PHFs) can significantly impact one’s quality of life. Moreover, management of highly comminuted or displaced PHFs poses a significant challenge amongst elderly population due to poor bone quality. Prosthetic replacement of humeral head or its stabilization using external plates is a commonly employed intervention for treating three- and four-part PHFs. Thus, these two methods were compared in this study to identify a preferable intervention. Methods: Patients were randomly divided into two groups to receive proximal humerus internal locking system (PHILOS®, Synthes, Switzerland) plating and Neer’s hemiarthroplasty. The deltopectoral approach was deployed as the surgical method. Their surgical outcome was assessed from functional range of motion (ROM) and Constant-Murley scores at regular intervals of three, six, twelve, and twenty-four weeks. Results: Twenty patients were divided into two groups who received PHILOS(®) plating and Neer’s hemiarthroplasty, averaged 67.2 years and 72.8 years. The ROM pertaining to flexion, extension, abduction, internal rotation, and external rotation for individuals with PHILOS(®) plating was 20%, 12.5%, 14.7%, 11.5%, and 18.5% higher than those who received Neer’s hemiarthroplasty. Moreover, the Murley score was also 8.7 units higher for individuals with PHILOS(®) plating. Conclusions: Prognosis following PHILOS® plate osteosynthesis had a better overall outcome than hemiarthroplasty with Neer’s prosthesis. Although hemiarthroplasty yielded a consistent functional outcome, PHILOS® plate osteosynthesis tends to restore a greater ROM. Thus, PHILOS® plating is recommended as the suitable method to manage three- and four-part PHF for people above fifty-five years of age.