(b)(4).Product was not returned to the manufacturer for evaluation.Therefore, we are unable to determine the definitive cause of the reported event.X-ray review results: level unknown, thoracic fracture dislocation treated with altitude expandable cage.Pre-op, intra-op, post-op, post-op revision films provided.Initial construct looks ok though superior foot plate not entirely contacting vertebral body endplate, and cage in posterior part of intervertebral space.Failure ct shows anterior translocation of upper spine.Suspect given posterior column injury, 360 degree fusion was indicated for initial procedure.Root cause: patient factors, surgical technique.
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