Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1986-12-16
1989-01-31
Apley, Richard J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
623 18, A61F 232
Patent
active
048013013
ABSTRACT:
A ball and socket joint for implanting in the body is provided which comprises (1) a ball; (2) a cup to be affixed to bone which includes (a) a spherical cavity and (b) two coaxial pin members which extend into the cavity; and (3) a bearing member surrounding a portion of the ball and rotatable within said spherical cavity about said coaxial pin members, the bearing member having an asymmetric opening therein, the opening having an angular extent of less than 180.degree. in at least one plane. In certain preferred embodiments, the cup includes first and second portions, the first portion to be affixed to bone, the second portion having associated therewith the coaxial pin members and being moveable with respect to the first portion to provide a plurality of possible orientations for the axis of rotation of the bearing member within the spherical cavity.
REFERENCES:
patent: 3818512 (1974-06-01), Shersher
patent: 3903549 (1975-09-01), Deyerle
patent: 4004300 (1977-01-01), English
Harris, William H., Clinical Orthopaedics and Related Research, No. 81, Nov.-Dec., 1971.
Vitallium Harris Total Hip System, Howmedica, Inc., Rutherford, N.J.
Pipino and Calderale, Acta Orthopaedica Belgica, vol. 46, pp. 5-13 (1980).
Pipino and Calderale, Pan. Med., vol. 25, pp. 231-238 (1983).
Apley Richard J.
Isabella David J.
Joint Medical Products Corporation
Klee Maurice M.
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