Depuy Orthopaedics, Inc.

Johnson & Johnson Orthopaedics, Inc.

Debra J Treacy

Salvatore Caldarise

John V Hamilton

An implantable prosthesis having porous textured surface regions and methods for making the same provide improved prostheses and prosthesis manufacturing methods. The implantable prostheses contain one more bead preforms that are secured to the metallic prosthesis components during the casting process to form porous textured surface regions in desired areas of the prostheses.

Implantable prostheses with metallic porous bead preforms applied during casting and method of forming the same

Implantable prosthesis with metallic porous bead preforms applied during casting

A process for making a composite stem for a prosthesis by providing a tapered metal core with a predetermined cross section and a composite shell having a tapered cavity having a cross sectional configuration to receive the metal core. Adhesive is applied to the metal core and the core is placed in the cavity and pressure is applied along the axis of the metal core toward the smaller end of the core to force the core against the composite shell and heat is applied with the pressure to bond the composite shell to the metal core.

Composite prosthesis and method of manufacture

A composite stem for a prosthesis, particularly a hip prosthesis, including a metal core and a fiber reinforced composite shell surrounding the core to provide modulus values that are similar to bone. The composite shell is preferably composed of braided fibers and a thermoplastic resin. The stiffness of the prosthesis can be varied along the length of the stem. The metal core contributing between 5 and 25 percent of the total flexural stiffness of the stem.

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Middleborough, MA, United States of America

Debra J Treacy