Prospective, Multiconfiguration Study to Assess Functional Performance of Primary Total Knee Arthroplasty System

The study is designed as a prospective, single arm stratified, multi-center investigation. Approximately 20 study sites, worldwide, will enroll 1040 subjects (1040 knees). Each study is expected to enroll approximately 52 subjects (approximately 52 knees). An additional 10 subjects per site may be recruited at sites which have Sub-Investigators participating in the study. Cohort reallocation is permitted. There will be no control group. One thousand and forty (1040)Subjects will be stratified into 4 subgroups of 260: cruciate retaining fixed bearing(CR FB), posterior stabilized fixed bearing (PS FB), cruciate retaining rotating platform (CR RP), and posterior stabilized rotating platform (PS RP). Treatment assignment in this study is not randomized. Each site will only enroll patients in one of the four knee configuration sub-groups most commonly used as their standard of care.