Early results of reverse total shoulder arthroplasty using a patient-specific baseplate to address severe glenoid deficiency

Abstract

Background The purpose of this study was to describe outcomes of patients undergoing reverse total shoulder arthroplasty (rTSA) using a patient-specific, custom glenoid component to address severe glenoid deficiency. Methods Retrospective chart review identified patients at a single institution undergoing rTSA using the glenoid vault reconstruction system (VRS) between 2017 and 2022. Radiographic evaluation, range of motion and patient-reported outcome (PRO) measures, complications, and re-operations were assessed. Results Fourteen shoulders were included. There was 100% implant survivorship of the glenoid baseplate at mean follow-up of 26.6 months. Mean range of motion improved in forward elevation (62–106 degrees), abduction (41–100 degrees), and external rotation (11–36 degrees). In 7 of 13 patients available for PRO collection, the mean final Visual Analog Pain Scale (VAS) score was 1.29, Single Assessment Numeric Evaluation (SANE) score was 72.14, American Shoulder and Elbow Surgeons Standardized Shoulder Assessment Form (ASES) score was 77.14, and Penn Shoulder score was 72.26. Conclusions Use of this custom glenoid resulted in encouraging clinical and radiographic outcomes, with no failures in implant survivorship seen at early follow-up. Larger prospective studies with longer-term follow-up should be undertaken in order to better determine the efficacy and longevity of this implant. Study Design Retrospective case series; Level of evidence, 4.