There has been a previous report received with a similar device where this malfunction resulted in a serious injury.Therefore, it must be presumed that recurrence of this malfunction could possibly cause or contribute to a serious injury or require medical or surgical intervention to preclude such.As such, this event is reportable per 21cfr part 803.Investigation results received: the sem investigation did not show or detect defect in the material.According to vdw, the customer followed the procedure by using a canal root preparation and low speed as recommended 1000-200 pm.However in absence of clinical procedure details asked by e-mail dated on (b)(6) 2016, it is difficult to determine the exact reason.The dark/back at the broken part may suggest to think that the drill was blocked (for undetermined reason) when during the drilling operation.This submission is being made after an acquisition and internal audit of rtd.
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