title: The effect of four preparation techniques on the amount of apically extruded debris.
authors.forename: D R
authors.initials: DR
authors.lastname: Fairbourn
authors.forename: G M
authors.initials: GM
authors.lastname: McWalter
authors.forename: S
authors.initials: S
authors.lastname: Montgomery
mesh_terms: D003786:Dental Pulp Cavity / Q000033:anatomy & histology; D006801:Humans; D012390:Root Canal Therapy / Q000295:instrumentation / Q000379:methods*; D013016:Sound; D014092:Tooth Root / Q000033:anatomy & histology; D014464:Ultrasonic Therapy / Q000295:instrumentation / Q000379:methods