title: Evaluation of apical cavity preparation with a new type of ultrasonic diamond tip.
abstract: This study evaluated the time, occurrence of fracture, and quality of apical cavity preparation with three different ultrasonic diamond tips: Satelec, Trinity, and a new type, CVD (chemical vapor deposition), using scanning electron microscopy (SEM) analysis. Thirty human single-rooted premolars were selected, submitted to apicectomy, and prepared with ultrasonic tips; impressions were then obtained. The presence of fractures was evaluated on the impressions, and the quality of preparation was evaluated by SEM analysis of teeth and scoring by two examiners. The group prepared with the CVD tips exhibited the shorter preparation time and did not present fractures. There was no statistically significant difference in the quality of preparation for the three tips. The three brands of ultrasonic tips produced adequate grinding without altering the morphology of the apical foramen.
authors: Department of Endodontics, Bauru Dental School, University of São Paulo, Al. Dr. Otávio Pinheiro Brisolla 9-75, CEP 17012-901 Bauru, SP, Brazil. dr.ricardoaffonso@uol.com.br
authors: Ricardo A
authors: RA
authors: Bernardes
authors: Ivaldo G
authors: IG
authors: de Moraes
authors: Roberto B
authors: RB
authors: Garcia
authors: Norberti
authors: N
authors: Bernardineli
authors: Jarcio V
authors: JV
authors: Baldi
authors: Fausto R
authors: FR
authors: Victorino
authors: Bruno C
authors: BC
authors: Vasconcelos
authors: Marco A H
authors: MA
authors: Duarte
authors: Clovis M
authors: CM
authors: Bramante
mesh_terms: D001047:Apicoectomy; D001641:Bicuspid / Q000648:ultrastructure; D003786:Dental Pulp Cavity / Q000293:injuries / Q000648:ultrastructure*; D018130:Diamond; D004867:Equipment Design; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D018915:Root Canal Preparation / Q000295:instrumentation*; D013499:Surface Properties; D013997:Time Factors; D019227:Tooth Apex / Q000293:injuries / Q000648:ultrastructure*; D014464:Ultrasonic Therapy / Q000295:instrumentation*
chemical_list: D018130:Diamond