As described, the product failed to meet specification; however, no product was returned for analysis.These screws are used in treatments.The investigation determined the root cause to be that this manufacturing lot had been made on a specific milling machine, which caused tool marks in the threads, leading to fracture during insertion of the screw.As a result, a recall was initiated for the trilogy screws produced on this specific milling machine.Reference recall (b)(4) for additional details regarding the corrective actions taken.
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