11. A dynamic spine stabilization component wherein the dynamic spine stabilization component comprises: a tubular shield having a lumen; the lumen having a proximal end and a distal end; the tubular shield being configured and adapted to be secured within a bore in a housing at a proximal end of a bone screw such that the lumen of the tubular shield is aligned with a longitudinal axis of the bone screw; a deflectable post having a proximal end, an elongated body and a distal end; the proximal end of said deflectable post extending from the proximal end of said lumen; a spherical retainer at the distal end of the deflectable post; the spherical retainer being pivotally associated with the distal end of the lumen; a spring positioned within the lumen between the deflectable post and the tubular shield such the spring flexibly resists pivoting of the deflectable post towards the tubular shield; a fastener adapted to secure the tubular shield within the bore in the housing of the bone screw; and whereby, with the tubular shield secured within the bore in the housing of a bone screw the spring flexibly aligns the deflectable post with the longitudinal axis of the bone screw.
17. The dynamic spine stabilization component of claim 11 , wherein said spring comprises one or more spring washers.