On (b)(6) 2016 integra investigation completed.Method: failure analysis, device history evaluation.Results: failure analysis - an elevator was returned in used condition, not showing any unusual markings and minimal wear.The tip is broken.The instrument was evaluated by (b)(4).Their findings are, ¿we have proofed the production records: all of them are correct.Therefore we will eliminate a fault of production or a fault of material.We suppose that the handling of the doctor and the angle of the elevator to the tooth during leveling could be the cause of the break but we cannot identify the exact cause of the break." the complaint is confirmed.Device history evaluation - nonconforming product report / nonconforming material report history: none.Variance authorization / deviation history: none.Engineering change order/manufacturing change order history: there is no applicable engineering change order/manufacturing change order history.Corrective action preventive action history: none.Health hazard evaluation history: none.Conclusion: the root cause has not been identified as a workmanship or material deficiency.
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