(b)(4).This follow-up report is being submitted to relay additional and/or corrected information.The following sections were updated: b4, b5, d9, g3, g6, h1, h2, h3, h6, h10.Visual examination of the returned ncb plate, screws, and locking caps identified the plate was broken into two parts.The fracture of the plate is located through a screw hole.On the fracture surfaces, beach lines are visible which point to a possible fatigue fracture failure.The fracture surfaces show also small polished areas and some scratches, most probably due to contact between the parts after the fracture.Review of the device history record identified no deviations or anomalies during manufacturing.A definitive root cause cannot be determined.If any further information is found which would change or alter any conclusions or information, a supplemental report will be filed accordingly.Zimmer biomet will continue to monitor for trends.
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