Disclosed is a
pedicle screw used in
spinal fusion surgery and a device for injecting
bone cement into a spine having low
bone mineral density by using the
pedicle screw so as to enhance strength of the spine. The
pedicle screw includes a screw rod fixedly inserted into a bone, a head section provided at an upper portion of the screw rod and formed at an inner portion thereof with a U-shaped recess and a screw part, and a
coupling section coupled with the screw part of the head section. The
coupling section is coupled with a rod support section including a bolt having a screw structure provided at an upper portion of the rod support section, a reverse U-shaped recess formed at a lower portion of the rod support section, and a pair of protrusions provided at lateral portions of the rod support section. The screw part of the head section is formed with a pair of guide slots. The screw rod is formed at an inner portion thereof with a hollow section, injection holes communicated with the hollow section are formed in the screw rod, and a feeding hole is formed in the U-shaped recess for feeding
bone cement. The
bone cement injection device has a cannula including an elongated body, a pedicle screw
coupling member provided at one end of the elongated body so as to be fixed to the pedicle screw, and a
handle provided at the other end of the elongated body and having an
injector coupling member which is coupled to an inlet of an
injector, and an impactor including an elongated cylindrical pressing rod inserted into the elongated body of the cannula and having a length longer than a length of the elongated body of the cannula, and a
handle attached to one end of the elongated cylindrical pressing rod.