Cruciate-retaining knee prosthesis

US8900316B2 · kind B2 · utility

Assignee

• SMITH & NEPHEW, INC. · US

Inventors

• Nathaniel Milton Lenz · Germantown, US
• Richard M. Smith · Memphis, US
• Zachary Christopher Wilkinson · Germantown, US
• Brian W. McKinnon · Bartlett, US
• Abraham Biglari Salehi · Bartlett, US
• Jonathan Nielsen · San Clemente, US
• Michael D. Ries · Chico, US
• Gerald J. Jerry · New Baltimore, US

Key dates

• Filing date: Jan 28, 2011
• Grant date: Dec 2, 2014
• Expiry date: Nov 29, 2031

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2002/3895
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Certain embodiments generally provide an improved tibial base member comprising keel portions that allow one or both cruciate ligaments to be preserved. Other embodiments provide improved lateral and/or medial inserts having a mesial lip that helps relieve and/or prevent impingement between the femoral component and the tibial eminence. Other embodiments provide improved femoral components having various chamfers to provide additional clearance with respect to the tibial eminence and posterior cruciate ligament without decreasing bone coverage.