Percutaneous extension for surgical implants of vertebral pedicles for correcting spinal stenosis

摘要

Upper part, lower part, and the spinal canal enlargement for implant with the inner member. The inner member, to work with the swivel joint located at both ends of the inner member of the implant. In addition, each swivel joints, to interact with one each of the top portion and a lower portion in the internal bore. Therefore, of the inner member for one or both of the upper part and the lower portion, move through one or both of the swivel joint, and then release the high order part from the lower part around the vertebra cutting section is moved parallel, the vertebrae cut portion spread, and to enlarge the spinal canal. Parallel rotatable operation of the mobile joint between the can, to allow the angulation of the inner member relative to the longitudinal axis of the implant, to accommodate spontaneous lateral shift that occurs during the expansion of the vertebral cut. .BACKGROUND 13