title: Effect of postpolymerization method on the color stability of composite resins submitted to ultraviolet aging.
abstract: The aim of this research was to evaluate the effect of postpolymerization method on the color stability of resin-based composites. Samples of direct and indirect restorative materials were polymerized with two photo-curing units (Visio photo-curing oven system and LED Elipar Freelight 2). All samples were submitted to an initial chromatic analysis using a spectrometer and submitted to ultraviolet-accelerated artificial aging. The direct material showed less color change than the indirect material, independent of the photo-activation method used. Samples photo cured with the LED system showed less change than those photo cured with the Visio system. The postpolymerization oven did not improve the color stability of direct and indirect resin-based composites.
authors.affiliation: Department of Restorative Denistry, Faculty of Dentistry of Araçatuba, São Paulo State University, Rue Jose Bonifacio 1193, Araçatuba, SP, Brazil. paulosantos@foa.unesp.br
authors.forename: Paulo Henrique dos
authors.initials: PH
authors.lastname: Santos
authors.forename: Fernando Isquierdo de
authors.initials: FI
authors.lastname: Souza
authors.forename: Ana Paula Albuquerque
authors.initials: AP
authors.lastname: Guedes
authors.forename: Sabrina
authors.initials: S
authors.lastname: Pavan
mesh_terms: D003116:Color; D003188:Composite Resins / Q000737:chemistry* / Q000528:radiation effects; D055117:Curing Lights, Dental / Q000145:classification; D003764:Dental Materials / Q000737:chemistry* / Q000528:radiation effects; D003793:Dental Restoration, Permanent / Q000145:classification; D006801:Humans; D006813:Humidity; D008422:Materials Testing; D058105:Polymerization; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature; D013997:Time Factors; D014466:Ultraviolet Rays
chemical_list: D003188:Composite Resins; D003764:Dental Materials; C444701:Filtek Z250; C477352:Sinfony composite resin