Modular stem extension

US9814583B2 · kind B2 · utility

Assignee

• Zimmer, Inc. · US

Inventors

• Dennis R. Aquilo · Winona Lake, US
• John E. Meyers · Columbia City, US
• Douglas G. Branscome · Fort Wayne, US
• Jack D. Jennings · Syracuse, US
• Abraham P. Habegger · Warsaw, US
• Alex Stoller · Fort Wayne, US
• Kelly A. Timmons · Warsaw, US
• Nathan Chastain · Warsaw, US
• Marvin Figueroa · Warsaw, US
• Clarence M. Panchison · Warsaw, US
• Gary D. Bos · Moxee, US
• Ernest U. Conrad · Seattle, US
• Kimberly Les · Clarkston, US
• Herrn Neumann · Magdeburg, DE
• Mary I. O'Connor · Jacksonville, US
• Peter S. Walker · Ridgewood, US
• George D. Letson · Tampa, US
• Thomas P. Vail · San Francisco, US

Key dates

• Filing date: May 8, 2007
• Grant date: Nov 14, 2017
• Expiry date: Sep 15, 2031

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2310/00544
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

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.