title: Morphological changes produced by acid dissolution in Er:YAG laser irradiated dental enamel.
abstract: Several scientific reports have shown the effects of Er:YAG laser irradiation on enamel morphology. However, there is lack of information regarding the morphological alterations produced by the acid attack on the irradiated surfaces. The aim of this study was to evaluate the morphological changes produced by acid dissolution in Er:YAG laser irradiated dental enamel. Forty-eight enamel samples were divided into four groups (n = 12). GI (control); Groups II, III, and IV were irradiated with Er:YAG at 100 mJ (12.7 J/cm(2) ), 200 mJ (25.5 J/cm(2) ), and 300 mJ (38.2 J/cm(2) ), respectively, at 10 Hz without water irrigation. Enamel morphology was evaluated before-irradiation, after-irradiation, and after-acid dissolution, by scanning electron microscopy (SEM). Sample coating was avoided and SEM analysis was performed in a low-vacuum mode. To facilitate the location of the assessment area, a reference point was marked. Morphological changes produced by acid dissolution of irradiated enamel were observed, specifically on laser-induced undesired effects. These morphological changes were from mild to severe, depending on the presence of after-irradiation undesired effects.
authors.affiliation: Universidad Autónoma del Estado de México, Facultad de Odontología, Centro de Investigación y Estudios Avanzados en Odontología (CIEAO), Jesús Carranza esq. Paseo Tollocan, Col. Universidad, C.P. 50130, Toluca, Estado de México, México.
authors.forename: Jennifer
authors.initials: J
authors.lastname: Manuela Díaz-Monroy
authors.forename: Rosalía
authors.initials: R
authors.lastname: Contreras-Bulnes
authors.forename: Oscar
authors.initials: O
authors.lastname: Fernando Olea-Mejía
authors.forename: Laura
authors.initials: L
authors.lastname: Emma Rodríguez-Vilchis
authors.forename: Ignacio
authors.initials: I
authors.lastname: Sanchez-Flores
mesh_terms: D000293:Adolescent; D003743:Dental Enamel / Q000528:radiation effects / Q000648:ultrastructure*; D006801:Humans; D019344:Lactic Acid / Q000494:pharmacology; D053844:Lasers, Solid-State / Q000627:therapeutic use*; D008855:Microscopy, Electron, Scanning
chemical_list: D019344:Lactic Acid
keywords: Er:YAG laser; SEM; acid dissolution; morphological changes