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Prosthetic Acetabulum for Hip Replacements

There are over 343,000 total hip replacements annually in the United States due to osteoarthritis, rheumatoid arthritis, osteonecrosis and other conditions. Current hip replacement systems have drawbacks including dislocation, restricted range of motion, hip impingement, and complex assembly. This invention addresses these drawbacks, consisting of a primary prosthetic head to be mounted to a femoral stem. The head is inserted in an acetabular liner of a unique design such that insertion of the femoral stem into the cavity of the head physically inhibits the removal of the head from the liner. The design also allows the directional loads associated with dislocation and impingement to be distributed across two faces, thereby decreasing the overall stress on the joint as stress is the quotient of force divided by area. Range of motion is improved producing over 120° of motion, and this device design can be applied to a plurality of systems including two-, three-, and four-component systems.

POTENTIAL AREAS OF APPLICATION:
-Primary Hip Replacements
-Revision Hip Replacements

MAIN ADVANTAGES OF INVENTION:
-Increased range of motion
-Reduced incidence of dislocation and hip impingement
-Applicable to two-, three-, and four-component systems
-Design features, such as a single manufactured surface on the head and dual liner extensions, reduce stress on the joint (Highlighted may be confidential)
-Easy to manufacture and assemble
-Increased femoral head diameter to stem shaft ratio

STAGE OF DEVELOPMENT:
-Prototype has been fabricated

Additional Details

Owner

University of Missouri

Intellectual Property Protection

Pending Patent



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