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.Evaluated handpiece.Handpiece was missing piece that attaches to drive dog and which the motor spins to make handpiece work.Handpiece couldn't be tested since handpiece wouldn't spin.During inspection found bur bearing came off the rotor and cap damaged from coming in contact with rotor.
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