The EKA Femoral Rotation Focus Group has not identified a single best reference method to determine femoral component rotation , but surgeons mostly prefer the measured resection technique using at least two l and marks for cross-checking the rotation .
Malrotation of the femoral component after primary total knee arthroplasty ( TKA ) is one of the most important problems leading to painful TKA requiring revision surgery .
A comprehensive systematic review of the literature was performed to present current evidence on how to optimally place the femoral component in TKA .
Comparison of joint line position changes after primary bilateral total knee arthroplasty performed using the navigation-assisted measured gap resection or gap balancing techniques
Purpose This study aim ed to compare the clinical and radiological results of navigation-assisted TKAs performed using the measured gap resection or the gap balancing technique in thirty patients who underwent bilateral primary TKAs . Methods Sixty cases of navigation-assisted TKAs [ 30 TKAs performed using the measured gap resection technique  ( Group A ) and 30 TKAs performed using the gap balancing technique ( Group B ) ] were analyzed prospect ively with minimum follow-up of 2 years . The joint line positions were measured using preoperative and postoperative weight-bearing anteroposterior and lateral radiographs . Clinical results were evaluated using knee scores and functional scores . Results No significant differences in knee scores or functional scores were observed . Polyethylene thickness and flexion/extension gaps were significantly larger in Group B ( P < 0.05 ) . The meaningful proximal shift of the joint line was shown in Group B ( P < 0.05 ) . Conclusion The navigation-assisted TKA with measured gap resection technique could be a useful technique with regard to restoration of the joint line . Level of evidence II
The EKA Femoral Rotation Focus Group has not identified a single best reference method to determine femoral component rotation , but surgeons mostly prefer the measured resection technique using at least two l and marks for cross-checking the rotation .
Malrotation of the femoral component after primary total knee arthroplasty ( TKA ) is one of the most important problems leading to painful TKA requiring revision surgery .
A comprehensive systematic review of the literature was performed to present current evidence on how to optimally place the femoral component in TKA .