Modular in-line deflection rod and bone anchor system and method for dynamic stabilization of the spine

摘要

A dynamic spine stabilization component suitable for use in stabilizing of the spine. The component is selectably attachable to a bone anchor for implantation in a bone of the spine. The dynamic spinal stabilization component includes a deflectable post connectable to a bone anchor. Deflection of the deflectable post is controlled by a compliant member. The force/deflection properties of the deflectable post may be adapted to the functional requirements and anatomy of the patient. The dynamic spinal stabilization component, when secured to a bone anchor, provides load sharing while preserving range of motion and reducing stress exerted upon the bone anchor and spinal anatomy.