Patent ID: 8252028

Claim:
A posterior dynamic stabilization system, comprising: a) first and second bone anchors having a distal end having a first threadform and a proximal end, b) a single continuous belt having a first portion and a second portion, and c) a spacer having a first end and a second end, the spacer being disposed between the respective bone anchors, d) first and second belt retainers, each retainer comprising an annulus having a circumferential channel therein, the annulus fitting over the proximal end of the respective bone anchor, e) first and second side springs, wherein the first side spring wraps around the first portion of the belt, and the second side spring wraps around the second portion of the belt, wherein the spacer is positioned between the two bone anchors to contact each bone anchor during spinal extension, wherein each belt retainer is locked onto a respective bone anchor, wherein each circumferential channel has an inner portion and an outer portion, wherein the belt is disposed within an outer portion of each channel, and wherein the spacer is disposed within the belt.