[Optimal therapy for isolated collateral ligament lesions at the knee joint]

Based upon a retrospective (1968-1978) and a prospective (1979-1987) clinical study (n = 581) the treatment with immediate protected active motion as a methode of choice is recommended. Our 3-fix-point-splint is a ideal device for simple and complexe valgus- and varus-instabilities at the quantitative stage of a monad and duad A. The treatment can be performed non-operatively. The range of motion is limited to 0/20/80 for 6 weeks. Conditio sine qua non is a precise diagnose without any lost of time. Contraindications of this treatment are discussed.