Zero profile small stature pedicle screw assembly and associated method of use

A method of installing a pedicle screw assembly, the method comprising:

• at least partially inserting the at least one bone screw into a bone of the patient with the at least one screw extender instrument;
• attaching a head fixation assembly to the at least one screwdriver instrument and inserting the head fixation assembly over the at least one bone screw;
• attaching at least one lateral interconnecting member to the head fixation assembly, wherein the at least one interconnecting member includes both a first plate and a second plate positioned in parallel on each side of the head fixation assembly with the upper body of the head fixation assembly includes an upward extending prong that interconnects into a downward facing upper groove in the first lateral plate and a downward facing upper groove in the second lateral plate and the lower body of the head fixation assembly includes a downward extending prong that interconnects into an upward facing lower groove in the first lateral plate and an upwardly facing lower groove in the second lateral plate;
• further reducing the at least one bone screw into the head fixation assembly with the at least one screwdriver instrument;
• and
• connecting a securing mechanism to lock an upper body of the head fixation assembly to the lower body of the head fixation assembly to prevent polyaxial motion and translation along the at least one interconnecting member.