Posterior stabilized orthopaedic knee prosthesis having controlled condylar curvature

Abstract

An orthopaedic knee prosthesis includes a tibial bearing and a femoral component configured to articulate with the tibial bearing. The femoral component includes a posterior cam configured to contact a spine of the tibial bearing and a condyle surface curved in the sagittal plane. The radius of curvature of the condyle surface decreases gradually between early-flexion and mid-flexion. Additionally, in some embodiments, the posterior cam of the femoral component may include a concave cam surface and a convex cam surface.

Description

[0001] Cross references to related patent applications [0002] This patent application claims priority under 35 U.S.C. § 119 to U.S. Provisional Application Serial No. 61 / 503,343, filed June 30, 2011, entitled "Posterior Stabilized Orthopaedic Knee Prosthesis Having Controlled Condylar Curvature," each in its entirety Incorporated herein by reference. This patent application is a continuation-in-part of U.S. Utility Patent Application Serial No. 13 / 481,943, filed May 28, 2012, entitled "Posterior Stabilized Orthopaedic Knee Prosthesis Having Controlled Condylar Curvature" by Joseph G. Wyss, which Each is incorporated herein by reference in its entirety. [0003] Additional cross-references to related US patent applications [0004] Cross reference to the following patent applications: U.S. Application Serial No. 12 / 165,575, entitled "Posterior Stabilized Orthopedic Knee Prosthesis Having Controlled Condylar Curvature," filed June 30, 2008 by Joseph G. Wyss et al., by John L. ...

AI Technical Summary

Problems solved by technology

Paradoxical forward translation can lead to loss of joint stability, accelerated wear, abnormal knee kinematics, and / or cause the patient to experience a sensation of instability during some activities

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