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Abstract

A total hip joint replacement prosthesis achieves mechanical integrity and dynamic stability without requiring an axial cavity to be bored into the femur, minimizes interfacial friction to reduce the proliferation of wear generated particles and establishes secure fixation of all components to extend implant lifetime and improve implant performance. Interactive femoral and acetabular components engage a femoral shoulder and a pelvic acetabular cavity, respectively. The femoral component comprises medial and lateral clamps, which engage the femoral shoulder. The acetabular component is secured within pelvic acetabular cavity, having a ball that incorporates two sets of opposingly disposed roller bearings. A substantially cylindrical channel extends between the sets of roller bearings to receive a bearing shaft, which cooperates with the roller bearings to facilitate rotational movement between the acetabular component and the femoral component. A bolt secures a cuboidal member of the acetabular component within a cuboidal cavity of the femoral component, comprising the connection between the femoral and acetabular components of the hip prosthesis device. A protective retainer stabilizes the acetabular component. The modular nature of the components of the device allows a less traumatic surgical operation than devices incorporating a femoral stem component.

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First Claim