title: Intracanal placement of calcium hydroxide: a comparison of techniques, revisited.
abstract: The goal of this in vitro study was to compare the effectiveness of three different placement techniques of calcium hydroxide paste in a curved canal. An acrylic resin block with a 44-degree curvature was instrumented to a #40 Flex-R file. The canal was filled with radiopaque calcium hydroxide paste using the following techniques: group 1, the paste was injected with an Ultradent tip; group 2, the paste was injected as in group 1 and followed by a size 35 Lentulo to working length; and group 3, the paste was placed with a size 35 Lentulo only, to working length. Each technique was performed 25 times. The radiodensity of the simulated canal was measured at 1, 3, 5, and 7 mm from the canal terminus. At 1 mm, the Lentulo was significantly better than the other two techniques. At 3 mm, the Lentulo technique and the combined technique were better than the Ultradent tip alone.
authors.affiliation: US Army Endodontic Residency Program at Fort Bragg, NC, USA. craig.torres@ng.gmedd.army.mil
authors.forename: Craig P
authors.initials: CP
authors.lastname: Torres
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Apicella
authors.forename: Peter P
authors.initials: PP
authors.lastname: Yancich
authors.forename: M Harry
authors.initials: MH
authors.lastname: Parker
mesh_terms: D002126:Calcium Hydroxide / Q000008:administration & dosage*; D003287:Contrast Media; D003762:Dental Instruments; D003765:Models, Dental; D012388:Root Canal Irrigants / Q000008:administration & dosage*; D012390:Root Canal Therapy / Q000295:instrumentation* / Q000379:methods*
chemical_list: D003287:Contrast Media; D012388:Root Canal Irrigants; D002126:Calcium Hydroxide