STRUCTURE OF PEDICLE SCREW

摘要

PURPOSE: A structure of a pedicle screw is provided to improve compatibility of different standard of screws since a joint portion of the screw is inserted into a path hole. CONSTITUTION: A cavity is formed in a head portion(200) and a path hole is open toward a lower portion of the cavity. A screw thread is formed on an outer circumference of a screw portion(20). A joint portion(10) is formed on the upper end of the screw portion. A screw(100) is inserted into the cavity. An inner diameter of the path hole is smaller than a maximum outer diameter of the joint portion.