Spinal fixation apparatus having length variable type rods and pedicle screws

摘要

The utility model relates to a spinal fixing device, particularly to a biological and flexible spinal column fixing device with shape memory alloy. A nodular flexible and longitudinal rod is connected with a vertebral arch root screw and is separated by a transverse connecting rod, the longitudinal rod and the transverse connecting rod are both made of shape memory alloy, and thus, the longitudinal rod and the vertebral arch root screw can be simply and conveniently connected. Even if the vertebral arch root screw is not aligned in the operation, the utility model can also simply and conveniently make the longitudinal rod on the vertebral arch root screw connected. In addition, even if the longitudinal rod inclines or is not parallel, the transverse connecting rod can also be easily arranged on a longitudinal rod pair.