Soft tissue balance in total knee arthroplasty with a force sensor.

This article presents a concise description and literature review of the eLibra Dynamic Ligament Balancing Device in total knee arthroplasty. This device is a force sensor that allows surgeons to balance the medial and lateral collateral ligaments during total knee replacement. This instrument provides precise, quantitative, digital information in newtons during surgery that allows surgeons to accurately externally rotate the femoral component in order to balance the forces across the medial and lateral compartments. The device is highly accurate and simple to use. It relies on objective dynamic data to balance the knee rather than static landmarks or subjective tensiometers.