A connector to secure a vertebral anchor with a connecting head end to a stabilizing rod, the connector comprising: a screw clamp to receive the connecting head end and to provide angular deflection and rotation of the vertebral anchor with respect to the screw clamp; a compression spacer including a dome to receive the screw clamp within the compression spacer to provide rotation of the screw clamp with respect to the compression spacer; and a rod receiver to house the compression spacer, the rod receiver including a first end having a transverse channel to receive the stabilizing rod in the transverse channel and threaded extensions to receive a tightening nut, characterized in that: the screw clamp comprises a cylindrical compressible shaft and an articulating end, the articulating end to receive the connecting head end; the compression spacer comprises a constricting tube having an external tapered end, the constricting tube receiving a portion of the screw clamp within the constricting tube through the external tapered end, the constricting tube providing vertical travel and rotation to the cylindrical compressible shaft of the screw clamp with respect to the compression spacer; and the rod receiver comprises a second end having an internal tapered section that cooperates with the external tapered end of the constricting tube (i) in a first vertical abutting position in which the screw clamp is received partially within the compression spacer allowing vertical travel and rotation to the screw clamp with respect to the compression spacer with the articulating end of the screw clamp being disposed outside the rod receiver, and (ii) in a second vertical abutting position in which the constricting tube is compressed about the screw clamp securing the connecting head end of the vertebral anchor with respect to the articulating end of the screw clamp outside the rod receiver. a screw clamp to receive the connecting head end and to provide angular deflection and rotation of the vertebral anchor with respect to the screw clamp; a compression spacer including a dome to receive the screw clamp within the compression spacer to provide rotation of the screw clamp with respect to the compression spacer; and a rod receiver to house the compression spacer, the rod receiver including a first end having a transverse channel to receive the stabilizing rod in the transverse channel and threaded extensions to receive a tightening nut, characterized in that: the screw clamp comprises a cylindrical compressible shaft and an articulating end, the articulating end to receive the connecting head end; the compression spacer comprises a constricting tube having an external tapered end, the constricting tube receiving a portion of the screw clamp within the constricting tube through the external tapered end, the constricting tube providing vertical travel and rotation to the cylindrical compressible shaft of the screw clamp with respect to the compression spacer; and the rod receiver comprises a second end having an internal tapered section that cooperates with the external tapered end of the constricting tube (i) in a first vertical abutting position in which the screw clamp is received partially within the compression spacer allowing vertical travel and rotation to the screw clamp with respect to the compression spacer with the articulating end of the screw clamp being disposed outside the rod receiver, and (ii) in a second vertical abutting position in which the constricting tube is compressed about the screw clamp securing the connecting head end of the vertebral anchor with respect to the articulating end of the screw clamp outside the rod receiver. the screw clamp comprises a cylindrical compressible shaft and an articulating end, the articulating end to receive the connecting head end; the compression spacer comprises a constricting tube having an external tapered end, the constricting tube receiving a portion of the screw clamp within the constricting tube through the external tapered end, the constricting tube providing vertical travel and rotation to the cylindrical compressible shaft of the screw clamp with respect to the compression spacer; and the rod receiver comprises a second end having an internal tapered section that cooperates with the external tapered end of the constricting tube (i) in a first vertical abutting position in which the screw clamp is received partially within the compression spacer allowing vertical travel and rotation to the screw clamp with respect to the compression spacer with the articulating end of the screw clamp being disposed outside the rod receiver, and (ii) in a second vertical abutting position in which the constricting tube is compressed about the screw clamp securing the connecting head end of the vertebral anchor with respect to the articulating end of the screw clamp outside the rod receiver.