Intra- and inter-observer variation during femoral jig rotational alignment in knee arthroplasty.

Introduction/aims Rotational alignment of the femoral prosthesis is important in total knee arthroplasty to improve performance and reduce complications. This study investigates the differences between two popular referencing methods and evaluates the variability of surgeons’ techniques (inter-observer) and their reproducibility (intra-observer) of femoral alignment.