DEVICES FOR DYNAMIC SIZING AND SAGITTAL BALANCING IN TOTAL KNEE ARTHROPLASTY

摘要

The present disclosure describes one or more embodiment of devices for assisting femoral component placement in total knee arthroplasty. The device may include a distractor configured to provide a constant distracting force. The distractor may include a main body of the distractor, a tibial paddle fixedly connected to the main body, the tibial paddle configured to engage a top of a tibia, at least one femoral paddle configured to push against a bottom of a femur, a spring housing fixed on the main body of the distractor, and a coiled constant force spring disposed in the spring housing. The spring housing is attached to an outer end of the coiled constant force spring, and the coiled constant force spring is configured to apply the constant distracting force on the at least one femoral paddle. The device further includes a mechanical apparatus for locating an isometric point of the femur.