Radiograph was received depicting a left iliac tulip separation from the bone screw shank, confirming the event.No index surgery information or product information provided.The subject screw and tulip head were not returned for evaluation as they remain in the patient.The patient is asymptomatic and there is no revision planned at this time.Unknown factors include: patient activity at the time or prior to the event, the degree of spinal instability, the degree of pseudarthrosis, patient compliance with post-operative care instructions or if the patient sustained a fall/impact of any sort (no trauma was reported.) these factors dictate the longevity of the implant.Root cause or specific failure mode cannot be determined.
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