Suspension arthroplasty versus interposition arthroplasty in the treatment of trapeziometacarpal osteoarthritis. a clinical and magnetic resonance imaging study

Biological arthroplasties are the most used surgical techniques, for the treatment of trapeziometacarpal osteoarthritis; all of them provide the reconstruction of trapeziometacarpal joint by a tendon graft. The aim of the study is to compare two surgical techniques: interposition arthroplasty and suspension arthroplasty at 12-month follow-up in order to evaluate the clinical and radiographic results. Sixty-seven patients surgically treated for basal thumb osteoarthritis were divided into two groups: 36 patients, (8 M; 27 F) (39 hands), treated with interposition arthroplasty are included in group A and 31 patients, (6 M; 25 F) (34 hands), treated with suspension are included in group B. Both groups were radiographically evaluated with X-ray and MRI at 12 months and clinically evaluated with DASH score, VAS, Grind test, hand grip tests, Kapandji test and ROM before surgery and at final follow-up. At final follow-up about Kapandji test, in group A, 31 hands (79.4%) presented Kapandji score of 10 and eight hands (20.6%), a Kapandji score of 8. In group B, six hands (17.6%) reported a Kapandji score of 8 and 28 patients (82.4%), a Kapandji score of 10 (p