Abstract
Objectives
Total joint arthroplasty is a valid surgical option for end-stage CMC1 osteoarthritis (OA). Currently, there are two types of implants used: the conventional single mobility design, and the new generation dual mobility design. Promising results for the latter design have been reported but there is scant literature on comparing the two implants. The objectives of this study were to first, assess the safety of the implants regarding loosening, revision, and luxation and second, compare the clinical outcomes and patient satisfaction of the two CMC1 implant designs.
Study design
This retrospective study evaluated plain radiographs for complications. To compare the clinical outcomes, patients were matched based on follow-up, age, and gender. Clinical outcomes consisted of lateral pinch and Grip strength, Kapandji, VAS, QuickDASH, and Nelson scores.
Results
An overall complication rate of 5.4% was observed and were all associated with the single mobility design. In contrast, the clinical outcomes were slightly superior in the single mobility design.
Conclusion
This study demonstrates excellent clinical and radiographic outcomes following CMC1 arthroplasty, with a clear trend toward an increased dislocation risk in the single mobility design.
Keywords
arthroplasty - osteoarthritis - total joint replacement - trapeziometacarpal joint
