(b)(4).This is a serious injury (as defined in 21 cfr section 803.3) as the patient reported having an adverse reaction and required medical intervention to prevent further injury.Because the malfunction allegation could not be confirmed, the cause of the adverse reaction could not be determined.This incident is being reported to maintain compliance with 21 cfr 803 and out of an abundance of caution.Narrative: directions for use indicate rubber dam use is required.The office used only gauze for isolation, which is inadequate.Product not returned to manufacturer.
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