Patent ID: 8021397

Claim:
A bone fixation system, comprising: a receiver member having a longitudinal axis; a bone anchoring member having a head portion and a bone-engaging portion, said bone anchoring member having at least a first maximum angular position and a second maximum angular position relative to said axis, wherein said second maximum angular position includes a greater angle relative to said axis than said first maximum angular position; and a base member rotatably connected to said receiver member adjacent to said bone anchoring member to permit rotational movement of said base member relative to said receiver member about said longitudinal axis when said base member is rotatably engaged to said receiver member, said base member having at least one wall defining an opening that allows said bone anchoring member to occupy either of said first maximum angular position and said second maximum angular position; and wherein said base member connects to said receiver member so that at least part of said base member is external of said receiver member, and wherein said at least part of said base member coin rises a lower surface sortion of said base member that is positioned substantially flush with or externally beyond an external bottom surface of said receiver member.