[Current aspects of therapy of rhizoarthrosis].

In patients with carpometacarpal osteoarthritis of the thumb, treatment strategies should be based on functional impairment and pain. Although X‑ray imaging is an integral component of the diagnostics, it is of subordinate importance for the therapy algorithm. Conservative therapy is always the first step in the chain of treatment. The efficacy of non-operative treatment, including intermittent immobilization using splinting and the application of technical assist devices in the daily routine has been proven to achieve pain relief. The intra-articular injection of hyaluronic acid or glucocorticoids is still under debate as some good experiences in routine clinical applications are contrasted by the lack of effectiveness in randomized studies. The indications for operative treatment are fulfilled by persisting pain after exhausting all the options for conservative therapy. In this case isolated trapeziectomy is the method of choice. Suspension (interpositioning) arthroplasty is not associated with improved clinical results. More recent procedures which aim to avoid proximalization by tendon interposition, have not yet shown better clinical outcome compared to trapeziectomy alone.