title: Fluorescence intensity of composite layering combined with surface sealant submitted to staining solutions.
abstract: OBJECTIVE
  The aim of this study was to evaluate the fluorescence intensity of a composite in different layering techniques combined to a surface sealant submitted to staining solutions.
  
  
  METHODS
  One surface sealant and one composite resin (shades A2-0, A2, and YE) were tested. Specimens were carried out using layering with different shades of composite, and dental blocks (dentin/enamel) were obtained of human molars. Fluorescence intensity measurement performed using a spectrofluorophotometer, before and after storage in cola, orange juice, red wine, and distilled water. Data were subjected to analysis of variance and Fisher's test (α = 0.05).
  
  
  RESULTS
  Initially, only A2-O + A2 layering showed fluorescence intensity statistically similar to the natural tooth. Overall, groups sealed showed the highest fluorescence intensity compared with unsealed groups. The aging decreased the fluorescence intensity compared with initial values. Red wine showed the highest decrease on the fluorescence intensity.
  
  
  CONCLUSIONS
  The fluorescence of composite restorations is dependent of the layering technique and is affected by the diet.
  
  
  CONCLUSIONS
  The staining solutions decreased the fluorescence intensity, even when the composite resins were sealed. Different shades of the same composite showed distinct fluorescence values, so there should be greater standardization of this property for tooth reconstruction success by the layering technique with large tissue loss.
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: Ana Paula Albuquerque
authors.initials: AP
authors.lastname: Guedes
authors.forename: Thaís Yumi Umeda
authors.initials: TY
authors.lastname: Suzuki
authors.forename: Marcos Kenzo
authors.initials: MK
authors.lastname: Takahashi
authors.forename: Evelise Machado de
authors.initials: EM
authors.lastname: Souza
authors.forename: André Luiz Fraga
authors.initials: AL
authors.lastname: Briso
authors.forename: Paulo Henrique dos
authors.initials: PH
authors.lastname: Santos
mesh_terms: D003188:Composite Resins; D005453:Fluorescence; D006801:Humans; D010895:Pit and Fissure Sealants; D012996:Solutions; D013050:Spectrometry, Fluorescence; D014075:Tooth Discoloration
chemical_list: D003188:Composite Resins; D010895:Pit and Fissure Sealants; D012996:Solutions