Abstract: A knee prosthesis which more accurately reproduces the rollback of natural knee movement and, thus, reduces wear on the tibial component. The knee prosthesis includes a femoral component with two cams, the first located between the posterior condylar sections and the second located towards the anterior end of the condylar sections with a slot surface therebetween. The tibial component includes a spine which engages each cam as it rotates along the femoral component and the slot surface during flexion and extension.

Abstract: The present invention provides methods and an apparatus for treating patients having ulcerations of the lower foot, including patients suffering from diabetic neuropathy. The brace generally includes a pair of rigid shells, a fastening system for joining the shells together to form a unified brace and a combination of bladders which engage the patient's leg and ankle to off-weight the plantar surface, prevent plantar flexing and minimize shearing forces to the plantar surface. The volume of the bladders may be adjusted by the addition or removal of a filler in order to maintain a uniform pressure between the bladders and the patient's leg. The filler contained in the bladders preferably does not undergo significant expansion or contraction in response to temperature or altitude changes.

Abstract: An prosthesis for allowing natural ball and socket type movement, as in a hip or shoulder. A femoral component having a ball at one extremity is engaged with an acetabular component having a hemispherical cup to receive the ball. A ligamentous material extends from a port in the hemispherical cup to a port in the ball to apply a resistive force to resist any dislocating force, the resistive force varying in proportion to the movement of the femoral component from a natural and relaxed position in relation to the acetabular component.