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 .
Gap balancing versus measured resection technique using a mobile-bearing prosthesis in computer-assisted surgery
Navigation has been developed to help surgeons install implants more accurately and reproducibly ; at the same time , this tool is able to record quantitative information such as joint range of motion , laxity and kinematics intra-operatively . As for st and ard surgery , two strategies are possible to achieve either femoral component rotation or overall prosthetic alignment : a measured gap resection approach , in which bone l and marks are used to guide resections equal to the distal and posterior thickness of the femoral component , or a gap-balancing technique , in which equal collateral ligament tension in flexion and extension is tried to find before as a guide to final bone cuts . The purpose of this paper is to compare the two different methods in a 67 patients group su bmi tted to the same procedure using mobile-bearing ( MB ) prosthesis  in order to analyse the effect of both techniques on joint line maintenance , axial limb restoration and components position . The gap group ( GG ) consists of 31 patients in whom the arthroplasty was performed using a navigated gap-balancing technique . The measured group ( MG ) consists of 36 patients in whom a computer-assisted measured resection technique was used . The results of imaging and the number of outliers were not statistically different ( P = 0.56 ) for the mechanical axis and prosthetic positioning between the two groups . The gap technique showed a statistically significant alteration of the post-operative value when compared with the measured resection technique , ( P = 0.036 ) . The mean elevation of the joint line was 4.09 mm for the GG and 3.50 mm in the MG
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 .