A specific dual-mobility prosthesis design in trapeziometacarpal joint osteoarthritis

Many prosthetic designs have been developed for treated trapeziometacarpal joint (TMJ) osteoarthritis (OA). The aim of the study was to analyze the clinical, functional, and radiological outcomes and complications of a specific dual-mobility prosthesis for TMJ OA to support the correct hand surgeon decision. Between January 2019 and January 2022, a retrospective study was conducted on a consecutive series of 14 patients affected by TMJ OA and treated with the implantation of TOUCH® dual mobility TMJ prosthesis (KeriMedical Switzerland-HQ, Geneve, Switzerland). The follow-up period was 12–36 months. Evaluation criteria included the trapeziometacarpal axis, the Visual Analogue Scale (VAS), the pulp-to-pulp modified pinch test, the Kapandji score, and the Michigan Hand Outcomes Questionnaire (MHQ). Clinical, functional, and radiological improvements were found in all outcomes analyzed. The postoperative values of VAS and pulp-to-pulp modified pinch test were statistically significant (p < 0.05). A non-statistically significant postoperative improvement was found in the Kapandji score (p < 0.05). Regarding complications, only one EPL injury was found, but no infection or prosthetic dislocation. The use of a TOUCH® dual-mobility prosthesis for treating TMJ OA improved postoperative clinical, functional, and radiological outcomes with a lower rate of complications in a short-term follow-up. IV.