[Arthroplasty of the knee. Prosthesis without uni- or bicondylar hinge]

The prosthesis has two components. The femoral component is metallic surfacing the condyle and a tibial plateau in polyethylene replaces the original one. The prosthesis can be uni or bi-condylar. Operative technique has to be very precise and the position of the prosthesis needs accuracy. The advantages are: minimal bone resection, small implant harmonic action with the knee joint as a whole. 20 patients with I8 months follow up are reviewed, problems are infections and pain in the patello-femoral joint. The results on pain and walking are good. Stability depends on accurate indications.