[paindoc]

The Dynesys Stabilization System is great in theory...it provides a flexible fixation system that was designed to try and circumvent the problem many standard fusion patients experience with "wearing out" the discs above and below the area of fusion. This occurs because axial and rotational forces normally applied to the fused segment are transfered to the adjacent levels. There has been a lot of success with the Dynesys, but because it is not widely performed in the US, we are just now starting to see the problems with this system. Namely, the pedicle screws are coming loose. I seems that the continued motion in the affected segment has overcome the engineering in the present pedicle screw. This would obviously be the thing to look for on down the line.