Fixed-bearing knee prosthesis having interchangeable components

US9398956B2 · kind B2 · utility

Assignee

• DEPUY IRELAND UNLIMITED COMPANY · IE

Inventors

• Stephen A. Hazebrouck · Winona Lake, US
• Daren L. Deffenbaugh · Winona Lake, US
• Mark A. Heldreth · Mentone, US
• Jack T. Bryant · Warsaw, US
• Rusty T. Meier · Warsaw, US

Key dates

• Filing date: Mar 7, 2013
• Grant date: Jul 26, 2016
• Expiry date: Mar 7, 2033

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2310/00796
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A fixed-bearing prosthesis includes a femoral component having a medial condyle surface and a lateral condyle surface. The knee prosthesis also includes a bearing having a medial bearing surface configured to articulate with the medial condyle surface of the femoral component, and a lateral bearing surface configured to articulate with the lateral condyle surface of the femoral component. A tibial tray is secured to the bearing. The tibial tray has a platform with an elongated stem extending downwardly from a lower surface thereof. A posterior buttress extends along a posterior section of the perimeter of the tray's platform, and an anterior buttress extends along an anterior section of the perimeter of the tray's platform. Differently-sized tibial trays are interchangeable with differently-sized bearings.