Patent ID: 8986349
Filing Date: 2015-03-24
Classification: A61B

Abstract:
1. A method for realigning a spinal bone in a patient having a spinal deformity, comprising the steps of: implanting a first spinal anchor into a first vertebral pedicle and implanting a second spinal anchor into a second vertebral pedicle of a different vertebra, the first spinal anchor including a first screw portion and a first receiver and the second spinal anchor including a second screw portion and a second receiver, wherein the first receiver is coupled to the first screw portion such that the first receiver is polyaxially rotatable relative to first screw portion, the first receiver being configured to engage a first closure member that is operable to lock a rod to the first receiver and the second receiver being configured to engage a second closure member operable to lock the rod to the second receiver; adjusting the orientation of the first receiver relative to the first screw portion to facilitate rod insertion into the first receiver, and inserting a rod into the first receiver and second receiver; coupling a manipulation instrument to the first receiver, the manipulation instrument having a distal end that engages the first receiver, a proximal end that extends from the patient when the distal end is engaged to the first receiver, and a longitudinal axis that extends through the proximal and distal ends, the manipulation instrument comprising an outer body surrounding an interior shaft that is coupled to the outer body and movable within the outer body along the longitudinal axis, the interior shaft further including a passage extending along the longitudinal axis, coupling a locking instrument to the manipulation instrument, the locking instrument having a housing situated near a proximal end that couples to the proximal end of the manipulation instrument and an elongate shaft that is passable through the passage and rotatable relative to the housing and the manipulation instrument, wherein rotation of the elongate shaft causes the elongate shaft to translate relative to the housing and the manipulation instrument, operating the locking instrument to advance the elongate shaft through the manipulation instrument and into the first receiver to inhibit the polyaxial rotation of the first receiver relative to the first screw portion prior to engaging the first closure member and the first receiver to lock the rod in the first receiver; and applying a corrective force to the first spinal anchor to adjust one of the position and orientation of the vertebra to which the first spinal anchor is connected; and thereafter locking the rod within the first receiver with the first closure member and locking the rod within the second receiver with the second closure member.