Abstract: In order to allow a knee-joint orthesis which is equipped with mounting structure for both the thigh and lower leg to take over the physiological movement of the knee-joint as precisely as possible, it is foreseen in accordance with the invention to connect the respective mounting structure pivotably by two intermediate rotation elements, whereby at least one rotation element includes a center of rotation which is displaceable relative to the mounting structures. The other rotation element includes preferably a center of rotation which is fixed relative to the mounting structures, and this rotation element is preferably arranged at the medial side of the knee-joint. Rotation elements with a displaceable center of rotation are designed preferably in form of a cross-over quadruple joint. The rotation element which possibly includes a fixed axis of rotation is formed preferably by a ball and socket joint.

Abstract: An ankle-joint brace is formed as a tube of a heat-shapable synthetic resin formed along its full length on one side with a throughgoing entry slot. The tube is sufficiently deformable that the slot can be spread widely enough to accommodate a patient's ankle region. This slot allows the flexible brace to be opened up enough to be removed. The tube is further formed with a heel seat complementary to the patient's heel and a sole part extending forwardly from the heel seat and complementary to the distal surface of the patient's instep. In addition it is formed with an instep part complementary to the proximal surface of the patient's instep, bounding part of the slot, and joined on the side opposite the slot to the sole part. Opposite the slot the tube is formed with a window accommodating the respective prominence of the patient's calcaneous and the slot is widened similarly to accommodate the respective prominence of the patient's calcaneous.