title: [Marginal leakage in composite resin restorations in posterior teeth. Effect of material, cavity preparation and enamel conditioning at the cervical level].
abstract: The purpose of this "in vitro" study was to investigate the cervical marginal leakage in class II restorations with chemically cured resin (P10) and light-cured resin (P30) in two types of cavities: conventional and adhesive. The effect of acid-etching in this area was also observed. Dentine adhesive Scotchbond was used in all experimental groups. Leakage was evidenced by Rodamina B dye penetration after thermocycling procedure between 10 degrees C and 50 degrees C temperature and analysed by using Zeiss Stereoscopic Magnifying Glass (10 X). According to the results obtained marginal leakage occurred in all experimental groups, with lower percentage for adhesives cavities when enamel acid-etching and light-cured resin P30 was used.
authors.affiliation: Faculdade de Odontologia - UNESP.
authors.forename: R
authors.initials: R
authors.lastname: Marotta Araujo
authors.forename: F P
authors.initials: FP
authors.lastname: da Silva Filho
authors.forename: A J
authors.initials: AJ
authors.lastname: Dias Mendes
mesh_terms: D000134:Acid Etching, Dental; D001641:Bicuspid; D003188:Composite Resins; D003737:Dental Cavity Preparation; D003738:Dental Cements; D003763:Dental Leakage / Q000517:prevention & control*; D006801:Humans; D019279:Resin Cements
chemical_list: D003188:Composite Resins; D003738:Dental Cements; D019279:Resin Cements; C048711:P-30 composite resin; C041330:Scotchbond
vernacular_title: Estudo da infiltração marginal em restaurações de resinas compostas para dentes posteriores. Efeito do material, preparo cavitário e condicionamento do esmalte a nível cervical.