Patent ID: 7727259
Filing Date: 2010-06-01
Classification: A61B

Abstract:
1. A spinal fixation apparatus comprising: a plurality of pedicle screws, each of which has a head formed at a top portion thereof and a thread formed below the head to be implanted into a pedicle of a vertebra, wherein the head has a reception cavity and two parallel rod grooves in a bottom surface of the reception cavity; a rod connected to a first pedicle screw and a second pedicle screw of said plurality of pedicle screws for preventing a movement of the vertebra, wherein said rod is made of a shape memory alloy which can be transformed at a designated temperature and wherein said each rod includes: a plurality of set members, each of said plurality of set members being inserted into a respective reception cavity of the head of a respective pedicle screw of said plurality of pedicle screws for preventing a movement of said rod.