Tibial augments for use with knee joint prostheses

US8506645B2 · kind B2 · utility

Assignee

• Zimmer, Inc. · US

Inventors

• Jeff Blaylock · Fort Wayne, US
• Michael Cook · Claypool, US
• Ron Donkers · Warsaw, US
• Scott Dykema · Warsaw, US
• David Jones · Elkhart, US
• John E. Meyers · Columbia City, US
• Stephen J. Vankoski · Fort Wayne, US
• Arlen D. Hanssen · Rochester, US
• David Lewallen · Rochester, US

Key dates

• Filing date: Sep 20, 2010
• Grant date: Aug 13, 2013
• Expiry date: Dec 3, 2030

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2310/00131
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A tibial augment for use with a knee joint prosthesis, composed of annular members of different stock sizes, each size being configured to fit within a cavity formed in a human tibia. The augment may include a stepped distal surface. A provisional (temporary) tibial augment used to ensure a proper fit for the permanent augment is also provided. The provisional may include grooves configured to cooperate with a set of ribs on a tong-like holder used for removing the provisional from the cavity. A pusher for use implanting the tibial augment is also provided. In addition, a system for creating a cavity in a human tibia is also described. The system preferably includes a guide with a slot therein and a set of osteotomes that are inserted within different portions of the slot. Methods for using the tools and/or implanting the prosthetic devices discussed above are also described.