Though no medical/surgical intervention was required to preclude a serious injury in this event, there have been previously reported events involving a similar device that resulted in the need for medical/surgical intervention to preclude permanent damage to a body structure or permanent impairment of a body function.Therefore, this event meets the criteria for reportability per 21 cfr part 803.Microscopic evaluation revealed debris within the head cavities.Dent observed inside the head cavity will cause the roundness dimension to be out of specification.Dentsply is unable to determine how the cap might have come unscrewed as all handpieces are 100% performance tested prior to shipping from dpd.
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