title: Evaluation of the permeability of the furcation area of deciduous molars conditioned with Er:YAG laser and cyanoacrylate.
abstract: The purpose of this study was to evaluate in vitro the dentin permeability of the deciduous pulp chamber floor after employing 2-octyl cyanoacrylate and Er:YAG laser. Twenty four deciduous molars were used, divided into four groups. After chemical-surgical preparation each group received a different treatment: Group 1 - control, without treatment; Group 2 - the floor of the pulp chamber was covered with a fine layer of 2-octyl cyanoacrylate; Group 3 - the floor of the pulp chamber was irradiated with Er:YAG laser (250 mJ, 10 Hz for 30 seconds, 80 J of energy and 320 pulses), and covered with a fine layer of 2-octyl cyanoacrylate; and Group 4 - the floor of the pulp chamber was irradiated with Er:YAG laser set at the parameters already described. After that the specimens received application of 0.5% methylene blue, for 15 minutes. The teeth were cut, photographed, and the digitalized images were analyzed using the ImageLab program. The results obtained were submitted to statistical analysis. Group 4 (Er:YAG) presented the largest averages in percentage of dye penetration area (19.5%), followed by Group 1 (11.1%), Group 3 (1.4%) and Group 2 (0.2%). The experimental model allowed to conclude that the specimens conditioned with 2-octyl cyanoacrylate (Group 2) and Er:YAG laser associated to 2-octyl cyanoacrylate (Group 3) presented a decrease in permeability, and the specimens treated with Er:YAG laser (Group 4) presented an increase in permeability of the analyzed area.
authors.affiliation: Department of Dentistry, University of Taubaté, Brazil.
authors.forename: Adriene Mara Souza
authors.initials: AM
authors.lastname: Lopes-Silva
authors.forename: José Luiz
authors.initials: JL
authors.lastname: Lage-Marques
mesh_terms: D003487:Cyanoacrylates / Q000494:pharmacology*; D003786:Dental Pulp Cavity / Q000187:drug effects / Q000528:radiation effects; D003806:Dentin Permeability / Q000187:drug effects / Q000528:radiation effects; D006801:Humans; D066298:In Vitro Techniques; D007834:Lasers; D008963:Molar; D014014:Tissue Adhesives / Q000494:pharmacology*; D014016:Tissue Conditioning, Dental; D014094:Tooth, Deciduous
chemical_list: D003487:Cyanoacrylates; D014014:Tissue Adhesives; C100832:octyl 2-cyanoacrylate