Acetabular cup
First Claim
1. An acetabular cup, comprising an outer surface, and a bearing surface (2), defining a sperical inner surface, for receiving an articular head (8) of an artificial hip joint, wherein the bearing surface (2) is bounded in surrounding relation by a receiving edge (3) and includes an elevation (10) which ascends from the receiving edge (3) to an apex (18) positioned at a distance to a lowest point (41) of the bearing surface 2, wherein the distance exceeds a radius (12) of the spherical inner surface, wherein the receiving edge (3) descends in the direction to the lowest point (41) such that the distance is less than the radius of the inner spherical surface thereby allowing for allowing a pivot space (46) for swingably supporting a stem (48) secured to the articular head (8).
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Accused Products
Abstract
An acetabular cup is supported by a pelvic bone and includes an outer surface which rests in a cavity, and a bearing surface which receives an articular body of an artificial hip joint and bounded in surrounding relation by a receiving edge. The receiving edge is provided at least at one area with an elevation which partially surrounds the articular head received by the bearing surface. The elevation is provided at a location in which the articular head is least obstructed in its freedom of movement, and has at its apex projecting furthest from the receiving edge a distance from a lowest point of the bearing surface which guides the articular head in substantially surrounding relation.
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Citations
32 Claims
- 1. An acetabular cup, comprising an outer surface, and a bearing surface (2), defining a sperical inner surface, for receiving an articular head (8) of an artificial hip joint, wherein the bearing surface (2) is bounded in surrounding relation by a receiving edge (3) and includes an elevation (10) which ascends from the receiving edge (3) to an apex (18) positioned at a distance to a lowest point (41) of the bearing surface 2, wherein the distance exceeds a radius (12) of the spherical inner surface, wherein the receiving edge (3) descends in the direction to the lowest point (41) such that the distance is less than the radius of the inner spherical surface thereby allowing for allowing a pivot space (46) for swingably supporting a stem (48) secured to the articular head (8).
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10. The acetabular cup of claim 10, wherein the ascent (44) has an ascending angle (45) of about 2°
- to 7°
.
- to 7°
Specification