High performance knee prostheses

US7922771B2 · kind B2 · utility

Assignees

• SMITH & NEPHEW, INC. · US
• The Trustees of the University of Pennsylvania · US

Inventors

• Jason Otto · Sunrise, US
• Brian W. McKinnon · Bartlett, US
• Michael Dean Hughes · Memphis, US
• Michael D. Ries · Chico, US
• Jan Victor · Knokke, BE
• Johan Bellemans · Langdorp, BE
• Johnathan Garino · Villanova, US
• Timothy Wilton · Duffield, GB

Key dates

• Filing date: Jan 31, 2008
• Grant date: Apr 12, 2011
• Expiry date: Apr 21, 2028

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2/3868
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Knee prostheses featuring components that more faithfully replicate the structure and function of the human knee joint in order to provide, among other benefits: greater flexion of the knee in a more natural way by promoting or at least accommodating internal tibial rotation in a controlled way, replication of the natural screw home mechanism, and controlled articulation of the tibia and femur respective to each other in a more natural way. Surfaces can be specially shaped using iterative automated techniques that allow testing and iterative design taking into account a manageable set of major forces acting on the knee during normal functioning, together with information that is known about natural knee joint kinetics and kinematics.