The bands and clamps were returned for evaluation.Upon inspection it was noted that all bands had been separated across the width and the ends had frayed.This type of band failure can only be replicated if the band has a cut or snag, and is then placed under extreme load.Evaluation of the scans provided show the clamps still in place at t8-t9 levels.It can also be noted that the screws at t10 have become loose and pulled out of the bone.It was noted that the breakage occurred in the middle of the bands, not at the clamp interface.While it is indeterminate as to the cause of the failure, it is possible the bands were nicked during insertion, frayed against hard bone, or clamp and band interference against the rod or bone.The cause of the reported issue cannot be determined.
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