Knee implant system

US8403994B2 · kind B2 · utility

Assignee

• WRIGHT MEDICAL TECHNOLOGY, INC. · US

Inventors

• William J. Maloney · Palo Alto, US
• J. David Blaha · Ann Arbor, US
• C. Lowry Barnes · Little Rock, US
• John M. Green · Arlington, US
• David R. Tuttle · Memphis, US

Key dates

• Filing date: Jan 19, 2011
• Grant date: Mar 26, 2013
• Expiry date: Jan 28, 2031

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2002/30892
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Knee prosthesis includes a femoral component adapted to fit on a distal end of the femur and a tibial insert component. The femoral component includes a measured anterior/posterior dimension defined by the posterior condyle surface and the interior surface of the anterior flange and a distal peg provided on a distal bone facing surface of each of the lateral and medial condylar structures, wherein the distal pegs are positioned at a midpoint of the measured anterior/posterior dimension. The implant system provides two distinct sizing segments and the tibial insert has a medial tibial aspect ratio of 0.74 and a lateral tibial aspect ratio of 0.65 to 0.68 for all sizes.