It was reported that the surgeon noticed that the ring on the plate bent, opened up, and came detached from the plate itself.The screw was aborted and the surgeon proceeded with the procedure without using that hole for fixation.There are no reports of adverse health consequences to the patient.
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Method: visual inspection, labelling review, risk assessment.Conclusion: the reported locking ring disengagement was confirmed upon email correspondence with the sales representative.The ring that disengaged was returned, however the plate was left implanted and the screw was discarded.Lot number was not provided and could not be retrieved from the returned ring.Therefore, device history review and complaint history review could not be performed.Per email correspondence with the sales rep, the screw holes were not prepared.Self drilling screws were used and threaded in.The locking mechanism broke prior to final tightening.Bone quality of the patient is normal according to the surgeon.The device surgical technique states: "note: to ensure proper locking of the bone screws, freehand insertion of the bone screws is not recommended and can result in back-out of bone screws if not properly aligned." incorrect screw trajectory can cause the screw to force ring to disengage from plate.It is likely that the ring disengaged due to incorrect trajectory, however, without device evaluation of the screw and/or the plate, the root cause could not be determined conclusively.
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It was reported that the surgeon noticed that the ring on the plate bent, opened up, and came detached from the plate itself.The screw was aborted and the surgeon proceeded with the procedure without using that hole for fixation.There are no reports of adverse health consequences to the patient.
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