This post-marketing investigation will evaluate the functional knee performance of Subjects
who have undergone primary total knee arthroplasty (TKA). Data from Subjects who receive one
of four contemporary knee configurations will be pooled to establish a contemporary dataset.
The primary objective of this study is to evaluate the pre-operative (approximately -90 to -1
day before surgery) to minimum one year (approximately 304 to 668 days) postoperative
functional performance improvement for the Attune™ primary, cemented TKA system as measured
by the activities of daily living (ADL)subscore of the Knee Osteoarthritis Outcomes Score
(KOOS)questionnaire (KOOS-ADL sub-score). This will be carried out for all four implant
configurations: cruciate retaining fixed bearing (Attune™ CR FB), cruciate retaining rotating
platform (Attune™ CR RP), posterior stabilized fixed bearing (Attune™ PS FB), and posterior
stabilized rotating platform (Attune™ PS RP).