Femoral neck endoprosthesis for an artificial hip joint
First Claim
1. A femoral neck endoprosthesis for an artificial hip joint having a ball joint, comprising:
- an adapter for accommodating the joint ball;
a support ring for axially and radially guiding the adapter on a proximal side of the femur; and
a support bearing for guiding the adapter on a lateral side of the femur, the adapter having a support shoulder directed toward the femur and a shaft for penetrating the femur approximately along an extended axis of the femoral neck, the support ring for being mounted only on the proximal side of the femur, said support ring having a flange support surface for being mounted on a worked bearing surface of proximal cortical substance of the femur and a hub for being mounted inside the femur, the support ring further having an axial stop for the support shoulder of the adapter and a bore for the shaft of the adapter so as to guide the adapter, the bore being laterally offset in relation to the support surface, the support bearing for being fixed only on the lateral side of the femur, substantially on the lateral cortical substance, the support bearing having a guide bore for the shaft of the adapter, which guide bore has an active axis adjustable with the axis of the adapter.
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Accused Products
Abstract
A femoral neck endoprosthesis for an artificial hip joint, having an adapter for accommodating the joint ball, a support ring for guiding the adapter on the proximal side of the femur, and a support bearing for guiding the adapter on the lateral side of the femur. The aim of the invention is to increase the strength of the bone tissue for a prosthesis. To this end, the prosthesis is configured in such a way that the adapter is provided with a support shoulder and with a shaft which penetrates the femur approximately along the extended axis of the femoral neck. The support ring is mounted on the proximal side of the femur only with its support surface. An axial stop for the support shoulder and a bore for the shaft are arranged on the support ring for guiding the adapter. The bore is laterally offset in relation to the support surface. The support bearing is fixed only on the lateral side of the femur and the guide bore for the shaft can be aligned with the axis of the adapter.
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Citations
12 Claims
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1. A femoral neck endoprosthesis for an artificial hip joint having a ball joint, comprising:
- an adapter for accommodating the joint ball;
a support ring for axially and radially guiding the adapter on a proximal side of the femur; and
a support bearing for guiding the adapter on a lateral side of the femur, the adapter having a support shoulder directed toward the femur and a shaft for penetrating the femur approximately along an extended axis of the femoral neck, the support ring for being mounted only on the proximal side of the femur, said support ring having a flange support surface for being mounted on a worked bearing surface of proximal cortical substance of the femur and a hub for being mounted inside the femur, the support ring further having an axial stop for the support shoulder of the adapter and a bore for the shaft of the adapter so as to guide the adapter, the bore being laterally offset in relation to the support surface, the support bearing for being fixed only on the lateral side of the femur, substantially on the lateral cortical substance, the support bearing having a guide bore for the shaft of the adapter, which guide bore has an active axis adjustable with the axis of the adapter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- an adapter for accommodating the joint ball;
Specification