title: Effectiveness of manual and rotary instrumentation techniques for cleaning flattened root canals.
abstract: The cleaning capacity of manual and rotary instrumentation techniques in mesial-distal flattened canals was studied by morphometric analysis. Twenty human mandibular incisors were divided into two groups of 10 teeth each: group 1, crown-down technique with rotary instrumentation using ProFile .04; group 2, crown-down technique with manual instrumentation using K-files. The teeth were evaluated with an optic microscope that was coupled to a computer to determine the percentage of root canal area with debris. The nonparametric Mann-Whitney U test showed a statistically significant difference at the level of 1% between the techniques. The manual technique was more efficient in cleaning mesial-distal flattened root canals than the rotary technique, although neither completely cleaned the root canal.
authors.affiliation: Faculty of Dentistry of Ribeirão Preto, University of São Paulo, Brazil.
authors.forename: João Vicente Baroni
authors.initials: JV
authors.lastname: Barbizam
authors.forename: Luis Fernando
authors.initials: LF
authors.lastname: Fariniuk
authors.forename: Melissa Andréia
authors.initials: MA
authors.lastname: Marchesan
authors.forename: Jesus Djalma
authors.initials: JD
authors.lastname: Pecora
authors.forename: Manoel D
authors.initials: MD
authors.lastname: Sousa-Neto
mesh_terms: D003762:Dental Instruments; D006801:Humans; D007180:Incisor; D009532:Nickel; D018915:Root Canal Preparation / Q000295:instrumentation*; D018709:Statistics, Nonparametric; D014025:Titanium
chemical_list: C040654:titanium nickelide; D009532:Nickel; D014025:Titanium