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Influence of a photopolymerized glaze in the initial biofilm formation on the surface of polymers used to manufacture temporary intra-oral prosthesis polished by a light cured glaze

Grant number: 15/02777-8
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): August 01, 2015
Effective date (End): July 31, 2016
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal Investigator:Daniela Micheline dos Santos
Grantee:Betina Chiarelo Commar
Host Institution: Faculdade de Odontologia (FOA). Universidade Estadual Paulista (UNESP). Campus de Araçatuba. Araçatuba , SP, Brazil


Some surface conditions of polymers used to manufacture provisional prosthesis, such as roughness and surface energy, may alter in the esthetical outcome of these restorations, by favouring adherence of microorganisms. Therefore, this study aims to investigate the adhesion of Streptococcus sanguinis on the surface of polymers used to manufacture provisional prosthesis, treated or not with a glaze polishing material, submitted to a thermocycling procedure. Different temporary polymers will be tested, heat-cured acrylic resin (HC) and light-cured acrylic resin (LC), and composite resins of Bis-ACRYL and BiS-GMA. It will be made 36 specimens for each resin, in which half of these will be mechanic polished and half polished with the light cured glaze. Then these samples will be randomly divided into 4 groups (n = 9), half to be used for the baseline period and half to be used after the thermocycling. For the thermocycling process the samples will be immersed in distilled water and be subjected to alternating 30 seconds baths at the temperatures of 5 ± 1 ° C and 55 ± 1 ° C, in a total of 2000 cycles. All samples will be subjected to surface energy and roughness tests and microbiological analysis. A triple microbiological analysis will be performed in three independent experiments, in which the colony count will be verified by the number of CFU / mL. The data obtained from surface energy, roughness and microbiological analysis will be submitted to appropriate statistical tests in order to compare the mean values and, when possible, correlate the data for the different methods, completing the analysis.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DOS SANTOS, DANIELA MICHELINE; COMMAR, BETINA CHIARELO; FREITAS DA SILVA, EMILY VIVIANNE; RICARDO BARAO, VALENTIM ADELINO; MATOS, ADAIAS OLIVEIRA; GOIATO, MARCELO COELHO. Influence of a light-activated glaze on the adhesion of Streptococcus sanguinis to the surface of polymers used in fabrication of interim prostheses. JOURNAL OF INVESTIGATIVE AND CLINICAL DENTISTRY, v. 10, n. 4, . (15/02777-8)

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