Artificial hip joint replacement system
AssigneesCornell University, Rochester Institute of Technology
InventorsStephen Boedo, John F. Booker
Life of this patent
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Abstract
The present invention relates to an artificial hip joint replacement system. The system includes an acetabulum portion having a cup suitable to be received by a subject's acetabular bone. The cup includes a rigid portion and an elastic portion attached to the rigid portion. Also included in the system is a ball received within the cup and in contact with the elastic portion and a femoral stem attached to the ball. The elastic portion is positioned to cause expansion and allow contraction of a space between the ball and the rigid portion of the cup so they are further apart from one another during periods of low mechanical loads.
Claims22
An artificial hip joint replacement system comprising:
- an acetabulum portion comprising:
- a cup suitable to be received by a subject's acetabular bone, said cup comprising:
- a rigid portion and
- an elastic portion comprising an elongate finger or tab, a curved beam, or a short rod-like cylinder wherein the elastic portion comprises a proximal end and a distal end, the elastic portion being attached to the rigid portion at some point other than the distal end, wherein the distal end protrudes away from the rigid portion toward an interior region of the cup;
- a ball, having a surface and a center, received by said cup and in contact with the distal end of the elastic portion, wherein the rigid portion has an ellipsoidal shape and the ball has a spherical shape;
- and
- a femoral stem attached to said ball, wherein the distal end of the elastic portion is positioned to allow a space between said ball and the rigid portion of the cup and cause expansion of the space so the ball and the rigid portion of the cup are further apart from one another during periods of low mechanical loads, and wherein the cup has a center and when the ball and cup centers are coincident, the space between the surface of the ball and the rigid portion of the cup is not uniform.
An artificial hip joint replacement system comprising:
- an acetabulum portion comprising:
- a cup suitable to be received by a subject's acetabular bone, said cup comprising:
- a rigid portion and
- an elastic portion comprising an elongate finger or tab, a curved beam, or a short rod-like cylinder wherein the elastic portion comprises a proximal end and a distal end, the elastic portion being attached to the rigid portion at some point other than the distal end, wherein the distal end protrudes away from the rigid portion toward an interior region of the cup;
- a ball, having a surface and center, received by said cup and in contact with the distal end of the elastic portion, wherein the rigid portion has a spherical shape and the ball has an ellipsoidal shape;
- and
- a femoral stem attached to said ball, wherein the distal end of the elastic portion is positioned to allow a space between said ball and the rigid portion of the cup and cause expansion of the space so the ball and the rigid portion of the cup are further apart from one another during periods of low mechanical loads, and wherein the cup has a center and when the ball and cup centers are coincident, the space between the surface of the ball and the rigid portion of the cup is not uniform.
Dependencies are inferred from the claim text.