Methods and systems for laterally stabilized constraint of spinous processes

Abstract

A spinal implant for limiting flexion of the spine includes a tether structure for encircling adjacent spinal processes. Usually, a pair of compliance members will be provided as part of the tether structure for elastically limiting flexion while permitting an extension. A cross-member is provided between the compliance member or other portions of the tether structure to stabilize the tether structure and prevent misalignment after implantation.

What is claimed is: 
     
         1 . A spinal implant for restricting flexion in a spine, said spinal implant comprising:
 a tether structure comprising an upper strap, a lower strap, and a compliance member coupling the upper strap to the lower strap, wherein the tether structured is configured to encircle at least two spinous processes of the spine, and wherein the compliance member elastically elongates to apply a force on the spinous processes to resist flexion of the spine.   
     
     
         2 . A method for restricting flexion in a spine, said method comprising:
 providing a tether structure comprising an upper strap, a lower strap, and a compliance member coupling the upper strap to the lower strap;   encircling at least two spinous processes of the spine with the tether structure; and   resisting flexion of the at least two spinous processes.