The part number, lot number, and quantity of screws is unknown; if the product information is received a medwatch will be submitted.Review of the device history records show that the lot was released with no recorded anomaly or deviation.The warnings in the package insert state, "care must be taken to avoid over tightening of screws.Intraoperative fracture or stripping of screws can occur if additional activations are applied while seating the screws, or additional torque is provided to the screw using a hand-held driver." current information is insufficient to permit a valid conclusion about the cause of this event.A follow up report will be sent upon completion of the device evaluation.
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