BALLON ANCHOR REINFORCING PEDICLE SCREW IN OSTEOPOROTIC SPINE

摘要

PURPOSE: A spine screw enforcement balloon anchor bolt is provided to be easily fixed to a bone of an osteoporosis patient in which bone mineral density is diminished by expanding a balloon part in the inner side of the bone. CONSTITUTION: A anchor part(110) is formed into hollow. The anchor part comprises an outlet hole(112) and an inlet hole. A bolt part(120) is inserted from the inlet hole. The bolt part moves toward a leading end. A balloon part(130) is arranged in hollow. A part of the balloon part is exposed to the outlet hole. A part of the exposed balloon part is expanded. The outlet hole is formed in eh side of the anchor part which contiguous to the leading end. A medium member is arranged between the outlet hole and bolt part and pressurizes the balloon part according to movement of the bolt part.