Zimmer Gmbh

George E Simpson

Mark Alan Bryant

Roy Y Hori

John D Webb, Jr

John D Miser

Robert A Winquist

Richard F Kyle

Grooved femoral hip stem prosthesis

An intramedullary nail system and method for providing the capability of creating intramedullary nails of any desired length by a combination of a small number of base nail members adapted to be joined to any one of a variety of hollow extension nail members. Any selected extension nail member may be axially connected to any selected base nail member in order to prevent axial separation of the members. Additionally, each extension nail member is provided with transverse openings adapted to receive a bone screw to secure the intramedullary nail within the bone to be repaird. The extension nail member is infinitely rotationally adjustable about the axis of the base nail member in order to enable the fixation of the extension member with any desired degree of anteversion prior to final assembly of the base nail member with the extension nail member.

Modular intramedullary nail

An intramedullary nail is disclosed having a tubular elongated body that includes a proximal head portion, an intermediate portion and a distal end portion. The intermediate portion has a longitudinal slot along one side thereof, a groove coextensive with a portion of the slot, and three other grooves spaced about the circumference of the body. This construction provides more desirable flexibility and allows improved revascularization about the nail. The nail is formed of a rod material and the slot and grooves are machined therein to the desired depth and shape.

Intramedullary nail

A prosthetic implant including a plurality of discrete grooves disposed in the proximal end of the implant stem. The grooves are each segments of curves generated from radii having a center of curvature offset from the implant stem in a generally lateral direction and toward the upper portion of the proximal end of the stem. The curve segments are preferably segments of concentric circles.

Grooved prosthetic implant

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Ft. Wayne, IN, United States of America

George E Simpson