Michael R Phipps

US Patent:

7625407, Dec 1, 2009

Filed:

Feb 7, 2006

Appl. No.:

11/349048

Inventors:

Shaw Akizuki - Nagano, JP
Michael C. Phipps - Hoboken NJ, US
Kevin P. Sichler - Springfield NJ, US

Assignee:

Howmedica Osteonics Corp. - Mahwah NJ

International Classification:

A61F 2/38

US Classification:

623 2032, 623 2028

Abstract:

A tibial prosthesis has tibial articular surfaces including a medial articular surface in a medial compartment and a lateral articular surface in a lateral compartment. The medial articular surface follows a first arcuate track having a first radius of curvature and a first posterior segment extending along a posterior aspect of the medial compartment to a first superior-interior location. The lateral articular surface follows a second arcuate track having a second radius of curvature and a second posterior segment extending along a posterior aspect of the lateral compartment to a second superior-inferior location. The second posterior segment has a slope extending in an inferior direction along the posterior aspect of the lateral compartment such that the second superior-inferior location is spaced a predetermined distance in an inferior direction from the first superior-inferior location.