Abstract
Introduction Trapeziometacarpal prosthesis implantation occurs for more than 50 years. Its disadvantage includes potential osteolysis, loosening, or dislocation. The development of dual mobility trapeziometacarpal prosthesis aimed to reduce the dislocation risk.
Material and Methods We analyzed 66 cases of dual mobility trapeziometacarpal prostheses implantation from 2019 to 2022, evaluating functionality, mobility, pain, and complication results.
Results The sample included 76.7% women, and the mean age of our patients was 62.4 years. Pain measured per the visual analog scale (VAS) scale decreased from 8.1 points preoperatively to 1.5 postoperatively. In 92.6% of the patients, the Kapandji index one month after surgery ranged from 9 to 10. In addition, the Quick Disabilities of the Arm, Shoulder, and Hand (DASH) score decreased from 46.2 to 9.8 points. There were two cases of cup loosening and one trapezium fracture in the first month after surgery. From one month to one year, we had one case of stem loosening. These complications required revision surgery. We did not observe any cases of dislocation.
Conclusions The dual mobility trapeziometacarpal prosthesis is a surgical option with good functional, mobility, and survival outcomes for patients with rhizarthrosis amenable to surgery.
Keywords osteoarthritis - trapeziometacarpal prosthesis - dual mobility - thumb - dislocation
