Different views about the biomechanics of the knee joint and late re construction of ligamentous injuries underline the obstacles impeding the establishment of generally acceptable principles for the treat ment of such lesions. As late as June 1976, HUGHSTON emphasized in the Journal of Bone and Joint Surgery that in spite of excellent anatomic studies, substantial uncertainty still prevails in knee joint surgery. Even the signifi cance of the anterior drawer sign for ruptures of the anterior cru ciate ligament is interpreted quite diversely, as illustrated in a comparison of HUGHSTON,...