title: Effect of different monomer-based composites and acid etching pre-treatment of enamel on the microleakage using self-etch adhesives systems.
abstract: OBJECTIVE
  To evaluate quantitatively the marginal microleakage of restorations carried out with self-etching adhesives with or without prior phosphoric enamel acid etching of silorane or methacrylate resin-based composite restorations subjected to thermal cycling.
  
  
  METHODS
  Forty cavities were prepared at the proximal surface of bovine incisors and randomly divided according to the etching of the enamel and restorative system used. The groups were restored with methacrylate [Adper SE Plus adhesive (3M ESPE) + Filtek Z250 (3M ESPE)] or silorane [Filtek LS adhesive (3M ESPE) + Filtek LS composite (3M ESPE)] restorative systems, light-cured using a LED unit (Bluephase 16i, Vivadent). After restorative procedure and thermocycling (1000 cycles), the specimens were immersed in methylene blue for 2 h. The specimens were triturated and the powder was used for analysis in an absorbance spectrophotometer. Data were statistically analyzed by 2-way ANOVA (alpha = 0.05).
  
  
  RESULTS
  No statistical difference between the restorative materials tested with or without previous acid etching of enamel in Class II marginal microleakage was observed (p > 0.05).
  
  
  CONCLUSIONS
  The use of acid etching prior to self-etching adhesives did not interfere on the microleakage of methacrylate- or silorane-based restorations.
authors.affiliation: Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas , Piracicaba, SP , Brazil.
authors.forename: Anderson
authors.initials: A
authors.lastname: Catelan
authors.forename: Maria Cecília Caldas
authors.initials: MC
authors.lastname: Giorgi
authors.forename: Giulliana Panfiglio
authors.initials: GP
authors.lastname: Soares
authors.forename: Debora Alves Nunes Leite
authors.initials: DA
authors.lastname: Lima
authors.forename: Giselle Maria
authors.initials: GM
authors.lastname: Marchi
authors.forename: Flávio Henrique Baggio
authors.initials: FH
authors.lastname: Aguiar
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods*; D000818:Animals; D002417:Cattle; D004396:Coloring Agents; D003188:Composite Resins / Q000737:chemistry*; D055117:Curing Lights, Dental; D003737:Dental Cavity Preparation / Q000145:classification; D003743:Dental Enamel / Q000648:ultrastructure*; D003763:Dental Leakage / Q000145:classification*; D003764:Dental Materials / Q000737:chemistry*; D055115:Light-Curing of Dental Adhesives / Q000295:instrumentation; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008751:Methylene Blue; D010756:Phosphoric Acids / Q000737:chemistry; D011897:Random Allocation; D062047:Silorane Resins / Q000737:chemistry; D013053:Spectrophotometry / Q000295:instrumentation; D013696:Temperature; D013997:Time Factors
chemical_list: D004396:Coloring Agents; D003188:Composite Resins; D003764:Dental Materials; C444701:Filtek Z250; D008689:Methacrylates; D010756:Phosphoric Acids; D062047:Silorane Resins; C555513:silorane composite resin; C030242:phosphoric acid; D008751:Methylene Blue
keywords: composite resins; dental leakage; dental restorations; methacrylate; silorane