title: Persistence of resinous cement residues in dentin treated with different chemical removal protocols.
abstract: The aim of this study was to evaluate the persistence of resin cement residues after dentin surface cleaning with different alcohol-based solutions or an essential oil (eucalyptol). Forty bovine teeth were sectioned in order to expose pulp chamber dentin to be washed with 1.0 mL of 2.5% sodium hypochlorite (NaOCl), followed by 0.1 mL of 17% EDTA application for 3 min, and final irrigation with 2.5% NaOCl. The specimens were air dried and resin-based cement was rubbed onto the dentine surface with a microbrush applicator. After 15 min, the surface was scrubbed with a cotton pellet and moistened with different dentin cleaning solutions, compounding the following groups: G1--95% ethanol, G2--70% ethanol, G3--70% isopropyl alcohol, or G4--eucalyptol. The dentin was scrubbed until the cement residues could not be visually detected. Sections were then processed for SEM and evaluated at × 500 magnification. Scores were attributed to each image according to the area covered by residual sealer, and data were subjected to Kruskal-Wallis at 5% significance. Eucalyptol promoted the most adequate dentin cleaning, although no statistical difference was detected amongst the groups (P > 0.05), except between the eucalyptol and 70% ethanol groups (P < 0.05). All the evaluated dentin cleaning solutions were unable to completely remove the cement residues from the dentin surface.
authors.affiliation: Department of Restorative Dentistry, Araraquara Dental School, UNESP-Univ Estadual Paulista, Araraquara, SP, Brazil. kuga@foar.unesp.br
authors.forename: Milton Carlos
authors.initials: MC
authors.lastname: Kuga
authors.forename: Marcus Vinicius Reis
authors.initials: MV
authors.lastname: Só
authors.forename: Norberto Batista
authors.initials: NB
authors.lastname: De Faria-júnior
authors.forename: Kátia Cristina
authors.initials: KC
authors.lastname: Keine
authors.forename: Gisele
authors.initials: G
authors.lastname: Faria
authors.forename: Semíramis
authors.initials: S
authors.lastname: Fabricio
authors.forename: Mariza Akemi
authors.initials: MA
authors.lastname: Matsumoto
mesh_terms: D000438:Alcohols / Q000627:therapeutic use*; D000818:Animals; D002417:Cattle; D003511:Cyclohexanols / Q000627:therapeutic use*; D003738:Dental Cements / Q000032:analysis* / Q000627:therapeutic use*; D003804:Dentin / Q000737:chemistry* / Q000187:drug effects* / Q000648:ultrastructure; D000077591:Eucalyptol; D007180:Incisor; D008855:Microscopy, Electron, Scanning; D039821:Monoterpenes / Q000627:therapeutic use*; D019553:Tooth, Nonvital
chemical_list: D000438:Alcohols; D003511:Cyclohexanols; D003738:Dental Cements; D039821:Monoterpenes; D000077591:Eucalyptol