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Kinematic vs neutral mechanical alignment techniques for TKA yielded similar outcomes at 5 years
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DALLAS — The kinematic alignment technique for total knee arthroplasty had no differences in functional outcome and clinical or radiographic failure compared with the neutral mechanical alignment technique at 5-year follow-up, according to results presented here.
Matthew Walker, FRACS, and colleagues randomly assigned 113 total knee arthroplasties to undergo a kinematic alignment technique or a neutral mechanical alignment technique.
“While we were aiming for a different alignment goal in each group, we also used different methods to achieve these goals,” Walker said in his presentation at the American Association of Hip and Knee Surgeons Annual Meeting. “In the kinematic group, we used specific cutting blocks and in the mechanical group, we used computer navigation to achieve neutral alignment.”
At 5-year follow-up, Walker noted the kinematic and mechanical alignment groups had no changes in Oxford scores and no significant differences in Forgotten Joint Score. He added one patient in the mechanical alignment group had a revision of the tibial or femoral component for infection, while five patients in the kinematic alignment group and four patients in the mechanical alignment group underwent reoperation.
“There were a similar number of radiolucent lines in both groups, and we saw no statistical difference in the progression of these lines,” Walker said. – by Casey Tingle
Reference:
Young SW, et al. Paper 1. Presented at: American Association of Hip and Knee Surgeons Annual Meeting; Nov. 1-4, 2018; Dallas.
Disclosure: Walker reports he receives research support from Stryker.