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. METHODS:Eight surgeons each established the femoral rotational alignment on four duplicate sets of six cadaveric femoral bone casts, referencing from the epicondylar axis and from the posterior femoral condyles. These derived axes were compared against a reference Whiteside's line (anteroposterior axis). RESULTS/SUMMARY:There was no significant difference between referencing techniques and a tendency to align the femoral component in slight external rotation. Femoral rotational alignment was reproducible by each surgeon. Extensive and significant variation in alignment exists between surgeons, independent of other factors (p < 0.001).


Wraighte PJ,Sikand M,Livesley PJ




Has Abstract


2011-09-01 00:00:00












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