title: A modern approach to surgical endodontics: ultrasonic apical preparation.
abstract: Ultrasonic devices are capable of generating better apical preparations than rotary instruments with less sacrifice of root structure. Regardless of the technique used, good lighting and magnification are necessary to insure an adequate apical preparation.
authors.affiliation: Columbia University School of Dental and Oral Surgery.
authors.forename: M
authors.initials: M
authors.lastname: Kellert
authors.forename: C
authors.initials: C
authors.lastname: Solomon
authors.forename: H
authors.initials: H
authors.lastname: Chalfin
mesh_terms: D006801:Humans; D012184:Retrograde Obturation / Q000379:methods*; D012390:Root Canal Therapy / Q000295:instrumentation*; D014092:Tooth Root / Q000601:surgery; D014464:Ultrasonic Therapy / Q000295:instrumentation*