Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1994-12-01
1996-09-17
Willse, David H.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
623 18, A61F 238
Patent
active
055564330
ABSTRACT:
A modular knee prosthesis includes a femoral component having a pair of spaced apart condylar portions each having a superior articulating surface and an inferior surface, and a boss structure disposed between and connecting the condylar portions. The prosthesis further includes an elongate stem member that mounts within the medullary canal of a distal portion of a femur, a collar and at least one securing bolt. The collar mounts upon the external end of the stem member, and has a distal surface that is substantially transverse to a longitudinal axis of the stem member when mounted thereon. The collar distal surface and the inferior surface of the boss structure define a selected mounting angle therebetween, and the securing bolt, which is adapted to mount within an aperture formed in the boss structure, has a head portion with a spherical first surface from which an elongate shaft portion extends. The shaft of the securing bolt can be disposed at a generally centrally located position or at a non-centrally located position on the head portion of the bolt.
REFERENCES:
patent: 4822366 (1989-04-01), Bolesky
patent: 4904110 (1990-02-01), Klein
patent: 4985037 (1991-01-01), Petersen
patent: 5127914 (1992-07-01), Calderale et a.
patent: 5133760 (1992-07-01), Petersen et al.
patent: 5152796 (1992-10-01), Slamin
patent: 5290313 (1994-03-01), Heldreth
patent: 5326359 (1994-07-01), Oudard
patent: 5336225 (1994-08-01), Zang
Johnson & Johnson Orthopaedics Research & Development "P.F.C..RTM.Modular Knee System Research Data and Laboratory Testing", cover and pp. 8, 36 and 37 (1989).
Gabriel Stefan M.
Sheehan David G.
Geary III William C.
Johnson & Johnson Professional Inc.
Snow Bruce E.
Willse David H.
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