title: Post space debridement in oval-shaped canals: the use of a new ultrasonic tip with oval section.
abstract: This study evaluates the effect on post space debridement in oval-shaped canals of an experimental ultrasonic tip with oval section (Satelec) compared with a circular ultrasonic tip (KaVo). Thirty teeth with an oval-shaped canal were endodontically treated and obturated and then randomly divided into 3 groups (n = 10) according to the procedure used for post space debridement: Satelec tip, Largo #2 drill + KaVo file, and Largo #2 drill + water. Debris and dentin tubules were evaluated by assigning scores to scanning electron microscope post spaces images; lower scores corresponded to fewer debris and higher number of open tubules. The Satelec group showed significantly lower debris and open tubules scores than KaVo group (p < .05) and control group (p < .05), which differed significantly between each other (p < .05). Also the debris and open tubules scores in different post space regions differed significantly among the experimental groups (p < .001). The oval ultrasonic tip resulted in a better post space debridement than a circular ultrasonic tip in oval-shaped canals.
authors.affiliation: Department of Fixed Prosthodontics and Dental Materials, University of Siena, Siena, Italy. conivan@freemail.it
authors.forename: Ivanovic
authors.initials: I
authors.lastname: Coniglio
authors.forename: Carlos Augusto
authors.initials: CA
authors.lastname: Carvalho
authors.forename: Elisa
authors.initials: E
authors.lastname: Magni
authors.forename: Amerigo
authors.initials: A
authors.lastname: Cantoro
authors.forename: Marco
authors.initials: M
authors.lastname: Ferrari
mesh_terms: D001641:Bicuspid; D003646:Debridement / Q000295:instrumentation; D003762:Dental Instruments; D003786:Dental Pulp Cavity / Q000033:anatomy & histology*; D003804:Dentin / Q000033:anatomy & histology; D004867:Equipment Design; D006801:Humans; D008855:Microscopy, Electron, Scanning; D011176:Post and Core Technique; D018915:Root Canal Preparation / Q000379:methods*; D016369:Smear Layer; D014464:Ultrasonic Therapy / Q000295:instrumentation*