Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1995-01-31
1997-03-11
Isabella, David
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
623 18, A61F 238
Patent
active
056096410
ABSTRACT:
A tibial prosthesis includes a tibial tray and a post extending therefrom for receiving one or more modular stems of differing sizes. The stem provides a closed socket that registers with the post. A wedge lock fit tightens the stem to the post upon assembly. The stem has a cylindrical section and a tapering section. Fins extend longitudinally from the proximal end to the distal end of the stem, tracking both the cylindrical and tapering portion thereof so that each of the fins tracks a uniform diameter section of the stem for a majority of its length. The tapering section of the stem is equal to about one third of its over all length, and defines the distal end of the stem. The fins are longitudinally placed about the stem exterior surface, and are generally parallel. Between the fins are U-shaped channels that are similarly longitudinally extending and generally parallel. The stem provides a central longitudinal axis. The fins and channels are parallel to the central longitudinal axis of the stem.
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P. F. C..RTM. Modular Porous Coated Tibial Tray With Screws, Surgical Technique, Johnson & Johnson Orthopaedics.
P.F.C..RTM. Long Stem with Specialist.RTM. Instruments, Revisional Surgical Technique, Johnson & Johnson Orthopaedics.
Carls Thomas A.
Evans David L.
Johnson Chris E.
Isabella David
Smith & Nephew Richards Inc.
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