What is the optimal valgus pre-set for intramedullary femoral alignment rods in total knee arthroplasty?

摘要

In total knee arthroplasty (TKA), intramedullary guides are often used for aligning the distal femoral cutting block. Because of the highly varying angles between the mechanical axis and the anatomical femoral axis (AMA), different valgus pre-sets have been recommended. The present study investigated the optimal valgus pre-set (measuring the AMA in long-leg radiographs or at 5A degrees, 6A degrees, 7A degrees or 8A degrees valgus) to align the cutting block perpendicularly to the mechanical axis.