Patent ID: 7763057

Claim:
A pedicle screw assembly comprising: a screw head comprising: an outwardly protruding and expandable bulbous end comprising a plurality of flanges and an inner portion, wherein said inner portion comprises a smooth-bored channel bored through said bulbous end; a slot adapted to receive a longitudinal member; and two opposed upright ends separated by said slot, wherein each of said opposed upright ends comprise an inner wall and an outer wall, wherein said inner wall comprises wall threads, and wherein said outer wall comprises grooves; a bone fixator component comprising an angled concave socket adapted to receive said bulbous end of said screw head; a pin mounted within an inner portion of said screw head and expanding said flanges of said bulbous end, wherein said pin sits flush with said slot and said pin sits flush with said smooth-bored channel; and a blocker adapted to engage said screw head and comprising blocker threads configured to mate with said wall threads.