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Influence of the storage medium on properties of experimental dental resins

Grant number: 10/00421-8
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): March 01, 2010
Effective date (End): February 28, 2011
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal Investigator:Renato Cilli
Grantee:Luiza de Paula Silva Cassiano
Host Institution: Faculdade de Odontologia de Bauru (FOB). Universidade de São Paulo (USP). Bauru , SP, Brazil


The aim of the present in vitro work is to evaluate the storage medium and brushing effects on mechanical properties of experimental Bis-GMA-based dental resins. Bis-GMA monomer will be mixed with TEGDMA (BT) or CH3BisGMA (BCH3) or CF3Bis-GMA (BCF3) monomers in a ratio of 30/70 mol%. To allow photo-curing, 0.2%wt of camphorquinone and N,N dimethyl-p-toluidine will be added to the comonomer mixtures. Specimens will be fabricated with each resin and the following tests will be made: tooth brushing abrasion, microhardness and roughness alterations and flexural strength. Mechanical properties will be evaluated before and after immersion (30 days) in different storage mediums: 1. artificial saliva; 2. artificial saliva in ethanol 75% and 3. artificial saliva containing cholesterol esterase. Data will be submitted to normality and homogeneity tests prior the selection of the appropriated statistical analysis (± = 0.05). (AU)

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