Michigan Knee Institute

Soft tissue balance

Soft tissue balance more important than knee alignment in TKA outcomes

At the American Academy of Orthopaedic Surgeons Annual Meeting, Jeffrey H. DeClaire, MD, FAAOS, discussed a multicenter study in which a robotic-assisted system was used for total knee arthroplasty planning in 266 patients.

The patients underwent TKA with knee balancing done within 0.5 mm as measured by a the OMNIBot robotic-assisted system (Corin Group). Researchers focused their analysis on laxity difference on the medial and lateral side of the knee in extension, mid-flexion and flexion. They then correlated those laxity parameter findings with the KOOS pain score, according to DeClaire.

“What we found was that when we balance that knee, again within a half a millimeter, which we’re able to measure with this OMNIBot, having a knee that’s slightly tighter medially than laterally at extension and close to equal or tighter medially at mid-flexion and slightly more lax lateral than the medial at flexion created a significant improvement in the KOOS pain score,” DeClaire told Healio.

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