title: Adaptation and penetration of resin-based root canal sealers in root canals irradiated with high-intensity lasers.
abstract: This research analyzed the quality of resin-based sealer adaptation after intracanal laser irradiation. Extracted teeth (n = 168) were root canal treated and divided into four groups, according to dentin surface treatment: no laser; Nd:YAG laser (1.5 W, 100 mJ, 15 Hz); diode laser (2.5 W in CW), and Er:YAG laser (1 W, 100 mJ, 10 Hz). The teeth were divided into four subgroups according to the sealer used: AH Plus, EndoREZ, Epiphany, and EpiphanySE. For testing the sealing after root canal obturation, the penetration of silver nitrate solution was measured, whereas to evaluate the adaptation and penetration of the sealer into the dentin, environmental scanning electron microscopy (ESEM) was used. The ESEM images were analyzed using a four-grade criteria score by three evaluators. The inter-examiner agreement was confirmed by Kappa test and the scores statistically compared by the Kruskal-Wallis' test (p < 0.05). Both adaptation and sealer penetration in root canals were not affected by the laser irradiation. Nd:YAG and diode laser decreased the tracer penetration for AH Plus, whereas EndoREZ and EpiphanySE performances were affected by Nd:YAG irradiation (p < 0.05). It can be concluded that intracanal laser irradiation can be used as an adjunct in endodontic treatment; however, the use of hydrophilic resin sealers should be avoided when root canals were irradiated with Nd:YAG laser.
authors.affiliation: Universidade Cruzeiro do Sul, School of Dentistry, São Paulo 01506-000, Brazil.
authors.forename: Cacio
authors.initials: C
authors.lastname: Moura-Netto
authors.affiliation: Universidade Ibirapuera, School of Dentistry, São Paulo 04661-100, Brazil.
authors.forename: Anna Carolina Volpi
authors.initials: AC
authors.lastname: Mello-Moura
authors.affiliation: Universidade Estadual Paulista, São José dos Campos 12245-000, Brazil.
authors.forename: Renato Miotto
authors.initials: RM
authors.lastname: Palo
authors.affiliation: Universidade Cruzeiro do Sul, School of Dentistry, São Paulo 01506-000, Brazil.
authors.forename: Igor
authors.initials: I
authors.lastname: Prokopowitsch
authors.affiliation: University of Connecticut, Health Center, Farmington, Connecticut 06032, United States.
authors.forename: Cornelis H
authors.initials: CH
authors.lastname: Pameijer
authors.affiliation: Universidade de São Paulo, São Paulo 05508-000, Brazil.
authors.forename: Marcia Martins
authors.initials: MM
authors.lastname: Marques
mesh_terms: D003786:Dental Pulp Cavity / Q000000981:diagnostic imaging / Q000528:radiation effects*; D003804:Dentin / Q000000981:diagnostic imaging; D004853:Epoxy Resins; D006801:Humans; D053685:Laser Therapy / Q000379:methods; D053844:Lasers, Solid-State / Q000627:therapeutic use*; D008855:Microscopy, Electron, Scanning; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D012389:Root Canal Obturation / Q000379:methods*; D012835:Silver Nitrate / Q000627:therapeutic use*; D018709:Statistics, Nonparametric
chemical_list: D004853:Epoxy Resins; D012387:Root Canal Filling Materials; D012835:Silver Nitrate