Prosthesis
AssigneePranesh Kumar
InventorPranesh KUMAR
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Abstract
Osteoarthritis (OA) is the most common disease affecting human joints. Mechanical stress through the joint is one of the most important independent etiological factors. The present invention provides a prosthesis that by passes some of the stress from the joint without destroying the joint surface. It allows may provide a full range of joint movement, while sharing the load with the physiological joint, thereby maintaining the viability of the physiological joint surface. In addition, the prosthesis can accommodate native soft tissue structures in or around the joint, such as ligaments.
Claims25
1-13. (canceled)
A knee prosthesis for insertion into a patient's knee joint, including
- a first plate configured for fixing to the patient's femur forming part of the knee joint,
- a first bearing surface associated with the first plate,
- wherein the first bearing surface is a shape having a series of involute mid points falling on a spiral so that the first bearing surface is shaped to conform to the articulating surface of the condoyles of the femur,
- a second plate configured for fixing to the patient's tibia forming part of the knee joint,
- a second bearing surface associated with the second plate,
- wherein the second bearing surface is shaped to conform to the articulating surface of the condoyles of the tibia,
- and wherein the shapes of the bearing surfaces ensure that in-use the bearing surfaces cooperate with each other to guide the movement of the patient's tibia relative to the patient's femur through a desired range of motion corresponding to the patient's native knee joint.
Dependencies are inferred from the claim text.