[Functional adaptation in transnaviculolunate resectionarthroplasty (Steinhäuser operation) (author's transl)].

The functional status of the new wrist joint after transnaviculo-lunate resectionarthroplasty is examined with a 12 year follow-up. The biomechanical and functional changes induced by total os lunatum and partial os navicularis resection are demonstrated. The resulting degenerative changes remain within tolerably acceptable limits after this long period. Clinically, we find a stable, almost completely pain free joint with good motion and good stress tolerance.