Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1982-07-15
1985-09-03
Apley, Richard J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
128 92C, 623 18, A61F 100
Patent
active
045383057
ABSTRACT:
A prosthesis for the knee joint has a tibial component and a femoral component. No mechanical connection exists between these components. The tibial component includes a shaft which carries a platform and is received in the cavity of the tibia so as to position the tibial component. The platform supports a bearing element which engages the femoral component and, in addition, a projection is mounted on the platform and extends towards the femoral component. The femoral component includes a shaft which carries a hinge and is received in the cavity of the femur to position the femoral component. The hinge, which defines a pivot axis for bending of the knee, comprises a hinge pin having a recess which faces the tibial component. The projection is slidably received in the recess and defines a rotational axis about which limited rotation of the tibial component relative to the femoral component may take place. In addition, the projection maintains the hinge pin in requisite position. The prosthesis is economical and may be constructed in a simple manner, without any screw connections, from elements which are readily assembled.
REFERENCES:
patent: 3934272 (1976-01-01), Wearne et al.
patent: 4094017 (1978-06-01), Matthews et al.
patent: 4112522 (1978-09-01), Dadurian et al.
Matthews et al, "Spherocentric Knee", Clinical Orthopaedics, No. 94, Jul.-Aug. 1973, pp. 234-240.
Engelbrecht Eckart
Keller Arnold
Nieder Elmar
Apley Richard J.
GMT Gesellschaft fur Medizinische Technik mbH
Isabella David J.
Kontler Peter K.
Waldemar Link (GmbH & Co.)
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