title: Ultrasonic retrograde preparation.
authors: University of Connecticut Health Center, 236 Farmington Avenue, Farmington, CT 06030 USA; Avon Oral and Maxillofacial Surgery, 34 Dale Road, Suite 105, Avon, CT 06001, USA.
authors: Stuart E
authors: SE
authors: Lieblich
authors: Bernard
authors: B
authors: McGiverin