Switching From a 6° to a 20° Valgus Prosthetic Trochlear Groove Improved the Forgotten Joint and Oxford Knee Scores After Kinematically Aligned Total Knee Arthroplasty.

ABSTRACT:

Background

In kinematically aligned (KA) total knee arthroplasty (TKA) using a femoral component with the traditional 6° valgus prosthetic trochlear groove (PTG), patients reported a lower Forgotten Joint Score (FJS) when the quadriceps line of pull was laterally misaligned to the groove, with an incidence of 89%. It remains unclear whether switching to a KA-optimized femoral component with a 20° valgus PTG, which properly aligns the quadriceps line of pull, can improve the FJS and the Oxford Knee Score (OKS).

Methods

The analysis of single-surgeon series of KA TKAs included 145 cases with a KA-optimized 20° valgus PTG and 292 cases with a 6° valgus PTG. Each participant reported their FJS and OKS at 2 years and underwent a postoperative coronal long-leg scan.

Results

SUBMITTER: Howell SM 

PROVIDER: S-EPMC12796931 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature