Method and apparatus for hip prosthesis
First Claim
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1. A hip prosthesis for implantation into a natural acetabulum and natural femur of a patient, comprising:
- a femoral component having a hemispherical portion and a femoral component hole in the hemispherical portion;
an acetabulum component having a cup-shaped receptacle to receive the hemispherical portion to allow universal movement between the femoral component and acetabulum component, the acetabulum component having an acetabulum component hole in the cup-shaped receptacle; and
a ligamentous material extending through the femoral component hole and the acetabulum component hole and adapted for attachment to at least the natural acetabulum to maintain engagement between the femoral component and acetabulum component.
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Abstract
An prosthesis for allowing natural ball and socket type movement, as in a hip or shoulder. A femoral component having a ball at one extremity is engaged with an acetabular component having a hemispherical cup to receive the ball. A ligamentous material extends from a port in the hemispherical cup to a port in the ball to apply a resistive force to resist any dislocating force, the resistive force varying in proportion to the movement of the femoral component from a natural and relaxed position in relation to the acetabular component.
39 Citations
14 Claims
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1. A hip prosthesis for implantation into a natural acetabulum and natural femur of a patient, comprising:
- a femoral component having a hemispherical portion and a femoral component hole in the hemispherical portion;
an acetabulum component having a cup-shaped receptacle to receive the hemispherical portion to allow universal movement between the femoral component and acetabulum component, the acetabulum component having an acetabulum component hole in the cup-shaped receptacle; and
a ligamentous material extending through the femoral component hole and the acetabulum component hole and adapted for attachment to at least the natural acetabulum to maintain engagement between the femoral component and acetabulum component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- a femoral component having a hemispherical portion and a femoral component hole in the hemispherical portion;
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12. A hip prosthesis for implantation into an acetabulum and femur of a patient, comprising a femoral component having a hemispherical portion;
- an acetabulum component having a cup-shaped receptacle to receive the hemispherical portion;
a femoral component hole in the femoral component, the femoral component hole having a port opening toward the acetabulum component, the port of the femoral component hole being chamfered to a diameter greater than a diameter of the femoral component hole;
an acetabulum component hole in the acetabulum component; and
a ligamentous material extending from the femoral component hole and out the femoral component hole port and into the acetabulum component to maintain engagement between the femoral component and the acetabulum component. - View Dependent Claims (13)
- an acetabulum component having a cup-shaped receptacle to receive the hemispherical portion;
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14. A hip prosthesis for implantation into an acetabulum and femur of a patient, comprising:
- a femoral component having a hemispherical portion;
an acetabulum component having a cup-shaped receptacle to receive the hemispherical portion;
an acetabulum component hole having a port opening toward the femoral component, the port of the acetabulum component hole being chamfered to a diameter greater than a diameter of the acetabulum component hole;
a femoral component hole in the femoral component; and
a ligamentous material extending from the acetabulum component hole and out the acetabulum component hole port and into the femoral component to maintain engagement between the femoral component and the acetabulum component.
- a femoral component having a hemispherical portion;
Specification