title: Surface characterization of polymers used in fabrication of interim prostheses after treatment with photopolymerized glaze.
abstract: The material used for interim prostheses fabrication must present excellent physical properties for greater longevity in the face of environmental conditions, which can occur in the oral cavity. The purpose of this study was to evaluate the effect of a photopolymerized glaze on the physical and mechanical properties of polymers used for the fabrication of interim prostheses, before and after thermocycling and immersion in staining solutions. One hundred samples of composite and acrylic resins were fabricated: Dencor chemically activated acrylic resin (CAAR) (n=20) and heat-polymerized acrylic resin (HPAR) (n=20), Charisma (n=20), Structur (n=20), and Protemp (n=20). A mechanical polishing was performed on half of the samples, and a chemical polishing was performed on the remaining samples. Subsequently, all samples were submitted to thermocycling and immersion in coffee staining solution for 21days. Analysis of color and microhardness, as well as atomic force microscopy (AFM), scanning electron microscopy (SEM), and energy dispersive x-ray spectrometry (EDS) were performed. The data were submitted to repeated-measures analysis of variance (ANOVA), followed by the Tukey test (α=0.05) and the Student t-test (α=0.05). It was verified that the glaze decreased the chromatic alteration values, and increased the microhardness values of the samples, with the exception of the Charisma resin. The samples that did not receive chemical polishing had the greatest number of surface irregularities. This study concluded that the groups with glaze presented less color alteration. In addition, Charisma and Structur resins exhibited the greatest chromatic stability. As to the microhardness, the values were greater when the samples were treated with the glaze, with the exception of the Charisma group.
authors.affiliation: Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Univ Estadual Paulista (UNESP), José Bonifácio St., 1193, Aracatuba, São Paulo 16015-050, Brazil. Electronic address: danielamicheline@foa.unesp.br.
authors.forename: Daniela Micheline Dos
authors.initials: DMD
authors.lastname: Santos
authors.affiliation: Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Univ Estadual Paulista (UNESP), José Bonifácio St., 1193, Aracatuba, São Paulo 16015-050, Brazil.
authors.forename: Betina Chiarelo
authors.initials: BC
authors.lastname: Commar
authors.affiliation: Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Univ Estadual Paulista (UNESP), José Bonifácio St., 1193, Aracatuba, São Paulo 16015-050, Brazil.
authors.forename: Liliane
authors.initials: L
authors.lastname: da Rocha Bonatto
authors.affiliation: Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Univ Estadual Paulista (UNESP), José Bonifácio St., 1193, Aracatuba, São Paulo 16015-050, Brazil.
authors.forename: Emily Vivianne Freitas
authors.initials: EVF
authors.lastname: da Silva
authors.affiliation: Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Univ Estadual Paulista (UNESP), José Bonifácio St., 1193, Aracatuba, São Paulo 16015-050, Brazil.
authors.forename: Mariana Vilela
authors.initials: MV
authors.lastname: Sônego
authors.affiliation: Technological Plasma Laboratory (LaPTec), Experimental Campus of Sorocaba, Univ Estadual Paulista (UNESP), Tres de Março Av., 511, Sorocaba, Sao Paulo, 18087-180, Brazil.
authors.forename: Elidiane Cipriano
authors.initials: EC
authors.lastname: Rangel
authors.affiliation: Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Univ Estadual Paulista (UNESP), José Bonifácio St., 1193, Aracatuba, São Paulo 16015-050, Brazil.
authors.forename: Aldieris Alves
authors.initials: AA
authors.lastname: Pesqueira
authors.affiliation: Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Univ Estadual Paulista (UNESP), José Bonifácio St., 1193, Aracatuba, São Paulo 16015-050, Brazil.
authors.forename: Marcelo Coelho
authors.initials: MC
authors.lastname: Goiato
mesh_terms: D000704:Analysis of Variance; D003116:Color; D006244:Hardness; D008027:Light; D008855:Microscopy, Electron, Scanning; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D019736:Prostheses and Implants; D013052:Spectrometry, X-Ray Emission; D013499:Surface Properties
chemical_list: D011108:Polymers
keywords: Acrylic resins; Chemical polishing; Color; Composite resins; Hardness