Kinematics and center of axial rotation during walking after medial pivot type total knee arthroplasty

摘要

COR estimation during walking. The projected transepicondylar axis of the femur on the tibial x-y plane was defined as the pTEA (solid line). The pTEA’ (dotted line) was defined as the change in pTEA after knee motion. The COR was defined as the intersection of pTEA and pTEA’. When the pTEA translated anteriorly and rotated externally, the COR was lateral, that is, lateral pivot (a). When the pTEA translated posteriorly and rotated internally, the COR was lateral (b). COR, center of axial rotation