A modular polyaxial locking pedicle screw

PRESENTS A pedicle screw, MODULAR, polyaxial AND DEVICE IMPLANT ORTOPEDICO ROD INCLUDING a shaft portion (100, 300), a crown (130, 350), PART herringbone (120, 320), and A rod coupling subassembly (160, 360). The shaft portion (100, 300) is designed to be inserted into pedicle, and alternate embodiments includes a recess (108) and a hemispherical BULB CONVEXO (308). In both embodiments, also it includes a SHAFT THREAD (110, 310) formed on the outer surface. PART herringbone (120, 320) GOOD THIS THREAD AND INCLUDES A long BALL (124) RECEPTACLE OR RECESSED (324). CROWN (130, 350) is an element CILINDRICO SEATING AROUND THE INTERCONNECTION OF THE COMBINATION ball and socket SO THE TANG (120, 320) and shaft (100, 300) to rotate coaxially AND HOLD SUBSEQUENTLY TANG AND THE SHAFT IN A FINAL FIXING.