Impact of Joint Laxity and Balance on 2-Year KOOS Outcomes of a Posterior Stabilized Total Knee Arthroplasty.

Intra-operative joint laxity is associated with post-operative outcomes in a PS knee design, wherein patients balanced within identified laxity targets reported improved outcomes over those that did not. Clinically significant thresholds were defined and were predominately found in mid-flexion and flexion for medial and lateral laxity. When target windows were combined further improved outcomes were identified.