Zimmer Gmbh

Bristol-Myers Squibb Compnay

Les, Kimberly

Conrad, Ernest U.

Vail, Thomas P.

Letson, George D.

Neumann, Herrn

Bos, Gary D.

O'connor, Mary I.

Walker, Peter S., Dr.

Jack D Jennings

Clarence M Panchison

Tracy R Gilliland

Gregory C Stalcup

Peter Stanley Walker

John Edward Meyers

Abraham P Habegger

G Douglas Letson

Steven L Meulink

Marvin Figueroa

Douglas G Branscome

Thomas P Vail

Alex Stoller

Kelly A Timmons

Gary D Bos

Kimberly Les

Mary I O'Connor

James L Crumley

Dennis R Aquilo

Ernest U Conrad

Herrn Neumann

Nathan Chastain

Mary I O'conner

George D Letson

Alex P Stoller

John E Meyers

Ernest U University Of Washington School Of Medicine Department Of Orthopaedics Conrad

Douglas G§ Branscome

Peter S Walker

The modular stem component may include a shaft portion, a head, and a sleeve. The shaft portion is configured for receipt within the intramedullary canal of a bone and the head is configured to receive another component of a modular prosthetic system, such as a femoral neck, thereon. In one exemplary embodiment, the head extends radially around at least a portion of the stem and includes a rib defining a flange extending therefrom. The sleeve, which is formed as an independent part of the modular stem component and is made at least partially of a highly porous biomaterial, includes opposing ends and has a bore extending therethrough. The bore is configured to facilitate sliding receipt of the sleeve on the head.

Modular stem extension

The present invention provides an improved prosthetic stem for implantation in a bone. Specifically, the present invention provides a prosthetic femoral stem having a strengthening rib protruding from the substrate thereof and being flush with a porous coating formed thereon. The strengthening rib is advantageously positioned so as to increase the cross-sectional moment of inertia of the prosthetic femoral stem and thereby decrease the stress on the anterio-lateral surface of the femoral stem. A protrusion in accordance with the present invention may also be utilized with a prosthetic femoral stem absent a porous coating. In such an embodiment, the height of the protrusion is such that the protrusion will be surrounded by the cement mantle formed when the prosthetic femoral component is cemented in a femoral canal.

Prosthetic stem with strengthening rib

The invention is directed to a method of attaching spikes (34) to an orthopaedic implant such as an acetabular cup (22). The acetabular cup (22) is formed with at least one tapered hole (28) therein which extends from an outside diameter (30) to an inside diameter (32) of the cup. At least one spike (34) having a tapered end (38) is pressed into a corresponding tapered hole (28) of the cup (22), whereby an interference fit is created between the tapered end (38) and the tapered hole (28). The spike (34) is metallurgically bonded to the cup (22), such as by electron beam welding and heat treating. The inside diameter (32) of cup (22) is then finished.

Method of attaching spikes to an orthopaedic implant

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Warsaw, IN, United States of America

Jack D Jennings