[Biomechanical and clinical studies of the transnaviculo-lunar resection arthroplasty (Steinhäuser operation) (author's transl)].

In advanced injuries of the proximal carpal row there is a therapeutic alternative to other methods of treatment--the Transnaviculo-Lunar Resection Arthroplasty of J. Steinhäuser. This operation gives the possibility to form a new joint by removing the os lumatum and the proximal two thirds of the os naviculare. The result is a painless new wrist which has a good range of motion. Since 1968 six Steinhäuser operations have been performed by attending orthopaedic surgeons of the "Orthopädische Klinik München Harlaching" follow-up study reports this clinical and radiographic results as well as the biomechanical fundamentales of the new wrist. The objective clinical and radiographic criterions, the subjective satisfaction of our patients and the biomechanical stability of the new wrist have shown, that there is a good prognosis of the Steinhäuser operation.