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Influence of nanoparticles addition on color stability, microhardness and flexural strength of specific resins to ocular prostheses confection

Grant number: 12/02907-0
Support type:Scholarships in Brazil - Master
Effective date (Start): September 01, 2012
Effective date (End): January 31, 2014
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal Investigator:Daniela Micheline dos Santos
Grantee:Agda Marobo Andreotti
Home Institution: Faculdade de Odontologia (FOA). Universidade Estadual Paulista (UNESP). Campus de Araçatuba. Araçatuba , SP, Brazil


The ocular absence implies on difficulties to establish social and affective ties; functional, emotional, personal and social disorders, and loss of aesthetic balance. A safe, aesthetic and satisfactory alternative to rehab patients with this deformity is the use of ocular prosthesis. It is very important to know about the physical and mechanical properties of the materials used on the prosthesis production. Nanoparticles have been added to the acrylic resins polymeric chain in order to improve these properties. So, this study aims to assess the influence of nanoparticles addition on the color stability, microhardness, and flexural resistance of artificial sclera N1 acrylic resin. To this purpose, 300 samples will be made and divided into 10 groups, according to the kind of opacifier associated to the artificial sclera N1 acrylic resin: control - without opacifier (C); zinc opacifier 1% (OZ1) ; zinc opacifier 2% (OZ2); zinc opacifier 2,5% (OZ2,5); titanium opacifier 1% (OT1); titanium opacifier 2% (OT2); titanium opacifier 2,5% (OT2,5); barium opacifier 1% (OB1); barium opacifier2% (OB2); barium opacifier2,5% (OB2,5). The specific samples to color and microhardness tests will have the dimension of 45 x 2mm (n=10); and the specific ones to flexural resistance test, will have the dimension of 64 x 10 x 3.3 mm (n=20). The color stability, microhardness and flexural strength tests will be realized before and after 1008 hours of accelerated aging. The color stability tests will be made through reflection spectrophotometry and the superficial microhardness will be measured by a hardness meter. The flexural strength will be measured through the EMIC, according to the three-point technique. Data will be submitted to the test of adherence to the normal curve, and appropriate statistical test will be applied.

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)
BONATTO, LILIANE DA ROCHA; GOIATO, MARCELO COELHO; FREITAS DA SILVA, EMILY VIVIANNE; PENHA OLIVEIRA, SANDRA HELENA; HADDAD, MARCELA FILIE; CHAVES NETO, ANTONIO HERNANDES; BALERA BRITO, VICTOR GUSTAVO; DOS SANTOS, DANIELA MICHELINE. Biocompatibility of primers and an adhesive used for implant-retained maxillofacial prostheses: An in vitro analysis. JOURNAL OF PROSTHETIC DENTISTRY, v. 117, n. 6, p. 799-805, JUN 2017. Web of Science Citations: 1.
ANDREOTTI, AGDA MAROBO; GOIATO, MARCELO COELHO; MORENO, AMALIA; NOBREGA, ADHARA SMITH; PESQUEIRA, ALDIERIS ALVES; DOS SANTOS, DANIELA MICHELINE. Influence of nanoparticles on color stability, microhardness, and flexural strength of acrylic resins specific for ocular prosthesis. INTERNATIONAL JOURNAL OF NANOMEDICINE, v. 9, p. 5779-5787, DEC 10 2014. Web of Science Citations: 10.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
ANDREOTTI, Agda Marobo. Influência da adição de nanopartículas na estabilidade de cor, microdureza e resistência à flexão de resina específica para confecção de próteses oculares. 2014. Master's Dissertation - Universidade Estadual Paulista "Júlio de Mesquita Filho" Faculdade de Odontologia (Campus de Araçatuba)..

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