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In vitro analysis of the color stability, hardness and roughness of acrylic resins with ou without glaze submitted to accelerated aging

Grant number: 13/16642-1
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): November 01, 2013
Effective date (End): October 31, 2014
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal Investigator:Daniela Micheline dos Santos
Grantee:Bruna Egumi Nagay
Host Institution: Faculdade de Odontologia (FOA). Universidade Estadual Paulista (UNESP). Campus de Araçatuba. Araçatuba , SP, Brazil


The ocular prosthesis is a treatment option for anophthalmic patients and must present aesthetic, physical and mechanical properties. This study aims to understand the effect of a photopolymerized glaze on the color stability, hardness and roughness of acrylic resin for artificial eyes. Forty discs (10 mm diameter x 3 mm thickness) were fabricated and divided in 4 groups (n = 10): N1 Acrylic resin without photopolymerized glaze (G1); Colorless acrylic resin without photopolymerized glaze (G2); N1 Acrylic resin with photopolymerized glaze (G3); Colorless acrylic resin with photopolymerized glaze (G4). All samples will be polished sequentially with sandpapers (240, 600 and 800-grit). In G1 and G2, a sandpaper 1200-grit will be also used and finalized with diamond solution with felt disk. In G3 and G4, samples will be coated with photopolymerized glaze MegaSeal. Color stability will be evaluated with reflection spectrophotometer and calculated by the CIE L*a*b* system . The hardness (Knoop) will be measured by microhardness tester machine with a load of 25g per 10 seconds. The surface roughness will be analyzed through a profilometer, and one sample from each group, through atomic force microscopy (AFM). All tests will be performed before and after the accelerated aging, which will be done for 1008 hours in an aging chamber. Data will submitted to the test of adherence to the normal curve in order to determine if they originate or not from a normal distribution to proceed the appropriate statistical 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; NAGAY, BRUNA EGUMI; FREITAS DA SILVA, EMILY VIVIANNE; BONATTO, LILIANE DA ROCHA; SONEGO, MARIANA VILELA; MORENO, AMALIA; RANGEL, ELIDIANE CIPRIANO; DA CRUZ, NILSON CRISTINO; GOIATO, MARCELO COELHO. In vitro analysis of different properties of acrylic resins for ocular prosthesis submitted to accelerated aging with or without photopolymerized glaze. Materials Science & Engineering C-Materials for Biological Applications, v. 69, p. 995-1003, . (13/16642-1)

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