On (b)(6) 2015 integra investigation completed.Method: failure analysis, device history evaluation.Results: failure analysis - there were 2 tofflemire retainers returned, used, showing minimal wear and no unusual markings.The retainers were tested with a matrix band; upon testing the bands held within specification and the screws released as designed.Device history evaluation: nonconforming product report / nonconforming material report history: (b)(4) issued 12/29/2014 and (b)(4) issued 1/28/2014 for incorrect configurations.Engineering change order/manufacturing change order history: there is no applicable engineering change order/manufacturing change order history.Corrective action preventive action history: scar # (b)(4) issued 1/14/2015 for tofflemire retainers opened and not seating right, made by (b)(4).Health hazard evaluation history: none.Conclusion: the complaint report cannot be confirmed; testing within the defined specification.
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