EARLY CLINICAL AND PATIENT-REPORTED OUTCOMES FOLLOWING REVERSE SHOULDER ARTHROPLASTY WITH PATIENT-MATCHED AUGMENTED GLENOID IMPLANTS: A CASE SERIES

Glenoid implantation during reverse total shoulder arthroplasty (RSA) is challenging in the presence of complex glenoid bone loss. Custom-made glenoid implants involve three-dimensionally (3D) printed augmented metal baseplates to match the patient's anatomy. This study reports early clinical, radiological and patient-reported outcomes (PROMs) following RSA using patient-matched glenoid implants. This retrospective case series included 19 patients who underwent RSA using the Comprehensive Vault Reconstruction System (VRS; Zimmer Biomet). All procedures were performed by a single surgeon at a secondary care centre between November 2018 and June 2024. Preoperative Oxford Shoulder Scores (OSS) were collected. Postoperative follow-up included range of motion (ROM) assessment, radiographs, OSS and American Shoulder and Elbow Scores (ASES). Paired t-tests and Wilcoxon signed-rank tests were used to compare pre- and postoperative data. Nineteen patients (mean age 78.7 years, SD 8.96) underwent RSA, 13 primary and 6 revision cases. No perioperative or early postoperative complications were noted. The mean preoperative OSS was 13.2/48 (SD 1.23). At a mean follow-up of 40 months (SD 23.8, range 10–77 months), active ROM was 109 o forward flexion, 95 o abduction and 21 o external rotation. OSS improved to 39.43 (SD 9.98; p<0.001) and ASES was 74.2 (SD 23.22). No radiological evidence of lucency was observed around the glenoid, while this was noted around the humeral stem in two asymptomatic cases. No revision surgery was required. RSA using patient-matched augmented glenoid implants provides excellent early functional and clinical outcomes in severe glenoid bone loss, with significant improvement in PROMs and no revisions within early follow-up.