每根长骨都有机械轴(mechanical axis)和解剖轴(Anatomical axis)。长骨机械轴是连接近侧关节和远侧关节中心点的连线,无论在额状面还是在矢状面上,机械轴永远是连接两个关节中心点的直线。髋关节的中心点位于股骨头圆形的中心点,膝关节的中心点位于股骨髁间窝和胫骨嵴中点,踝关节中心点位于距骨宽度的中点和胫骨下端宽度的中点。下肢机械轴就是通过髋关节中心、膝 Each long bone has a mechanical axis and an anatomical axis. Long bone mechanical axis is connected to the proximal joint and the center of the distal joint of the connection, both in the frontal plane or in the sagittal plane, the mechanical axis is always a straight line connecting the center of the two joints. The center of the hip is located at the center of the femoral head. The center of the knee is located at the midpoint of the femoral intercondylar notch and the tibial crest. The center of the ankle is located at the midpoint of the midpoint of the talus width and the width of the lower tibia. Lower extremity mechanical axis is through the hip center, knee