Effect of 980-nanometer diode laser on root canal permeability after dentin treatment with different chemical solutions.
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.
Marchesan
Melissa Andréia
MA
Department of Endodontics, University of Ribeirão Preto (UNAERP), Ribeirão Preto, SP, Brazil.
Brugnera-Junior
Aldo
A
Ozorio
José Estevam
JE
Pécora
Jesus Djalma
JD
Sousa-Neto
Manoel D
MD
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
D002593:Cetrimonium Compounds; D004338:Drug Combinations; D012388:Root Canal Irrigants; D014867:Water; D004492:Edetic Acid; D012973:Sodium Hypochlorite; D000077286:Cetrimonium