Total knee implant prosthesis assembly and method

US10179052B2 · kind B2 · utility

Assignee

• DEPUY IRELAND UNLIMITED COMPANY · IE

Inventors

• Chadd W. Clary · Warsaw, US
• Paul J. Rullkoetter · Warsaw, US
• Mark A. Heldreth · Mentone, US
• Travis D. Bennett · Huntington, US
• Richard D. Komistek · Knoxville, US

Key dates

• Filing date: Jul 28, 2016
• Grant date: Jan 15, 2019
• Expiry date: Jul 28, 2036

Classification

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

Abstract

A total knee implant prosthesis is disclosed. The total knee implant prosthesis includes a tibial component including a pair of bearing surfaces and a post positioned between the bearing surfaces, and a femoral component configured to rotate relative to the tibial component. The femoral component includes a pair of condyles sized and shaped to articulate on the bearing surfaces and a cam positioned between the pair of condyles. The cam engages the post at a first contact point when the femoral component is at 0 degrees of flexion and engages the post at a second contact point located lateral of the first contact point when the femoral component is at a first degree of flexion greater than 0 degrees. The cam is disengaged from the post when the femoral component is at a second degree of flexion greater than the first degree of flexion.