While no serious injury resulted in this event, there has been a previous report received 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.During evaluation handpiece failed specs and got hot.Handpiece locked up doing cut test due to cap bearing failure on the turbine.Bearing failure debris built up in head.Also cap damaged from coming in contact with rotor.
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