Hip joint socket for implantation without cement into the acetab

Details Hip joint socket for implantation without cement into the acetab Hip joint socket for implantation without cement into the acetab

1990-03-16

1991-12-24

Isabella, David J.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

A61F 232

Patent

active

050748815

ABSTRACT:
A hip joint socket for implantation without cement into the acetabulum of the hip bone, consisting of an elastic socket support, which has the shape of an essentiallly hemispherical shell and can be inserted in an interlocking manner into the correspondingly prepared acetabulum bed. The socket support is formed so that after its implantation it quicklly grows together with the hip bone, and, even with considerable stress, relative movement between the socket support and the acetabulum is prevented. This is attained by constructing the socket support so that it exhibits its greatest stiffness in cranial portion in the implanted state, while in the downward (caudal) direction the elasticity of socket support increases. The wall thickness of socket support is greatest in cranial portion and decreases in the direction toward caudal portion. In the elastic caudal portion of the socket support, two or more notches are provided that run parallel or substantially parallel to the equatorial plane with increased elasticity at different distances from the equatorial plane.

REFERENCES:
patent: 4792337 (1988-12-01), Muller
patent: 4834759 (1989-05-01), Spotorno et al.
patent: 4961748 (1990-10-01), Frey et al.
Medizintechnik-Rehabilitation, a prospectus of the Protek AG company.

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