High performance knee prostheses

US10149768B2 · 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
• Jonathan P. Garino · Villanova, US
• Timothy Wilton · Duffield, GB

Key dates

• Filing date: Jul 6, 2016
• Grant date: Dec 11, 2018
• Expiry date: Aug 23, 2036

Classification

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

Abstract

Knee prostheses 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 accommodating internal tibial rotation, replication of the natural screw home mechanism, and controlled articulation of the tibia and femur respective to each other in a natural way. Such prostheses may include an insert component disposed between a femoral component and a tibial component, the insert component featuring, among other things, a reversely contoured posterolateral bearing surface that helps impart internal rotation to the tibia as the knee flexes. Other surfaces can be 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.