The screw shaft remains in vivo and no product was returned for review.Review of the device history records indicates that the device was manufactured to specification and did not identify any deviations or anomalies.There have been no other complaints for this part/lot combination, to date.Without analysis of the fractured screw head, and with the present information, this fracture is considered a one-off event for this manufacturing lot, and a specific cause cannot be determined with certainty at this time.
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