title: Effect of 980-nanometer diode laser on root canal permeability after dentin treatment with different chemical solutions.
abstract: This study evaluated the effect of 980-nm diode laser at different parameters on root canal dentin permeability associated with different irrigants. Seventy-five canines were sectioned at 15 mm from the apex, prepared mechanically up to #40 .02 instrument, and irrigated with 2 mL distilled water. Final irrigation (10 mL) was used as follows: (1) distilled water; (2) 1% NaOCl; (3) 17% ethylenediaminetetraacetic acid + a cationic surfactant cetyltrimethylammonium bromide (EDTAC). Laser was applied at 1.5 or 3.0 W as either continuous wave or pulsed wave (100 Hz). The teeth were then processed histochemically, the percentage of copper ion penetration into the dentin of the canal walls was counted, and the data were analyzed statistically with the Tukey-Kramer test (alpha < .01). When laser was associated with water, an increase in permeability was found, whereas permeability decreased when associated with EDTAC. Dentin permeability after laser irradiation was directly dependent on the solution used for final irrigation.
authors.affiliation: Department of Endodontics, University of Ribeirão Preto (UNAERP), Ribeirão Preto, SP, Brazil.
authors.forename: Melissa Andréia
authors.initials: MA
authors.lastname: Marchesan
authors.forename: Aldo
authors.initials: A
authors.lastname: Brugnera-Junior
authors.forename: José Estevam
authors.initials: JE
authors.lastname: Ozorio
authors.forename: Jesus Djalma
authors.initials: JD
authors.lastname: Pécora
authors.forename: Manoel D
authors.initials: MD
authors.lastname: Sousa-Neto
mesh_terms: D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000494:pharmacology; D003481:Cuspid; D003804:Dentin / Q000187:drug effects* / Q000382:microbiology; D003806:Dentin Permeability / Q000528:radiation effects*; D004338:Drug Combinations; D004492:Edetic Acid / Q000494:pharmacology; D006801:Humans; D054023:Lasers, Semiconductor; D012388:Root Canal Irrigants / Q000494:pharmacology*; D012973:Sodium Hypochlorite / Q000494:pharmacology; D014867:Water / Q000494:pharmacology
chemical_list: D002593:Cetrimonium Compounds; D004338:Drug Combinations; D012388:Root Canal Irrigants; D014867:Water; D004492:Edetic Acid; D012973:Sodium Hypochlorite; D000077286:Cetrimonium