No Radiographic Evidence of Medial Collateral Ligament Elongation in Valgus Osteoarthritic Knees Enables Treatment with Kinematically Aligned Total Knee Arthroplasty.

Because MCL elongation was not detected in OA deformities up to 23° valgus, the risk of under-correcting the valgus deformity leading to instability and poor outcome scores is low when per-forming KA TKA using primary components without releasing the LCL and/or PCL.