Constrained prosthetic knee with rotating bearing

USRE44476E1 · kind E1 · reissue

Assignee

• Zimmer, Inc. · US

Inventors

• John E. Meyers · Columbia City, US
• Jerry L. Aikins · Warsaw, US
• Rodney Bays · Pierceton, US
• Michael Cook · Claypool, US
• Marvin Figueroa · Warsaw, US
• Adam M. Griner · Columbia City, US
• Bill H. Haywood · Warsaw, US
• Bill N. Sisk · Claypool, US
• Vincent A. Webster · Warsaw, US
• George D. Letson · Tampa, US
• Peter S. Walker · Ridgewood, US
• Russell Windsor · Larchmont, US

Key dates

• Filing date: May 7, 2010
• Grant date: Sep 3, 2013
• Expiry date: May 7, 2030

Classification

• Technology area (CPC —): General

Abstract

A constrained prosthetic knee having a modular hinge post and a rotating bearing. A cannulated hinge post is rotatably connected to the femoral component of the knee prosthesis so that a hinge post extension may be anteriorly positioned through the hinge post and into the tibial component of the knee prosthesis, after positioning of the femoral component in the femur and the tibial component in the tibia. The hinge post is preassembled to the femoral component so that such assembly is not required during the implantation procedure. A meniscal component forming the rotating bearing of the knee prosthesis is packaged together with the hinge post extension so that the appropriate hinge post extension is readily available.