Intermediate-Term Follow-Up of Biopro® Modular Thumb Implant for Carpometacarpal Arthritis

Purpose: Basilar thumb arthritis is a common condition that can be associated with significant disability. While surgical management has historically consisted of trapeziectomy-type procedures, hemiarthroplasty has become an increasingly common alternative. While outcomes have been promising, they vary according to the implant used. We sought to evaluate the performance of the BioPro® Modular Thumb implant. Methods: This was a retrospective review of 110 thumbs with carpometacarpal arthritis that underwent hemiarthroplasty between the years 2008 and 2016 with the BioPro® device. All thumbs had Eaton-Little Stage II or III arthritis. Patients were asked to complete preoperative and postoperative assessments using QuickDASH, as well as complete strength measurements using a dynamometer. Results: Mean age was 61 years, with average final follow-up at 3.8 years. Forty thumbs completed QuickDASH and showed a 34.78-point improvement at average 2-year follow-up. Implant survivorship was 88.18% at average 3.8-year follow-up. The most common cause of revision was titanium metal allergy. No implants dislocated. Conclusion: Outcomes of hemiarthroplasty using the BioPro® device were comparable or superior to alternatives and support its continued use.