Posterior stabilized orthopaedic knee prosthesis having controlled condylar curvature

US8834575B2 · kind B2 · utility

Assignee

• DEPUY IRELAND UNLIMITED COMPANY · IE

Inventors

• Joseph G. Wyss · Fort Wayne, US
• Dimitri Sokolov · Palo Alto, US
• Jordan S. Lee · Warsaw, US
• John L. Williams · Fort Wayne, US
• Said T. Gomaa · Fort Wayne, US
• John M. Armacost · Warsaw, US
• Christel M. Wagner · Plymouth, US

Key dates

• Filing date: May 28, 2012
• Grant date: Sep 16, 2014
• Expiry date: May 28, 2032

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2310/00179
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An orthopaedic knee prosthesis includes a tibial bearing and a femoral component configured to articulate with the tibial bearing. The femoral component includes a posterior cam configured to contact a spine of the tibial bearing and a condyle surface curved in the sagittal plane. The radius of curvature of the condyle surface decreases gradually between early-flexion and mid-flexion. Additionally, in some embodiments, the radius of curvature of the condyle surface may be increased during mid-flexion.