INFLUENCE OF NANOPARTICLES ADDITION ON HARDNESS, RUPTURE RESISTANCE AND PERMANENT DEFORMATION OF FACIAL SILICONE SUBMITTED TO ACCELERATED AGING

• Grant number: 12/05270-3
• Support type: Scholarships in Brazil - Master
• Effective date (Start): July 01, 2012
• Effective date (End): February 28, 2014
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal researcher: Marcelo Coelho Goiato
• Grantee: Adhara Smith Nobrega
• Home Institution: Faculdade de Odontologia (FOA). Universidade Estadual Paulista (UNESP). Campus de Araçatuba. Araçatuba , SP, Brazil

Abstract

Although satisfactory, the maxillofacial prostheses present aesthetics, comfort and durability limitations. Therefore, studies with the purpose to obtain better properties of these materials are unceasing. It is proven the efficiency of nanoparticles addition in the silicone protection, preventing its color degradation, however the literature is scarce when it comes to other physical property changes caused on the facial silicon. The aim of this study is to evaluate the influence of nanoparticles addition at rupture resistance, permanent deformation and hardness of Facial Silicone Silastic MDX4-4210. 520 samples of facial silicone will be made, 260 for rupture resistance test, 130 for hardness test and 130 for permanent deformation test. Nanoparticles added in the preparation of silicone samples are: zinc oxide (ZnO), barium sulfate (BaSO4) and titanium dioxide (TiO2). For each test (except the rupture test, which number of samples is duplicated), 40 samples will be made of silicon added to each type of nanoparticles, totaling 120 samples, and 10 samples only of silicone, without nanoparticles (control group). For each type of nanoparticle proposed to be added to the facial silicone, 20 samples will be prepared at a concentration of 1% and 20 at a concentration of 2%. For every concentration of nanoparticles, half (10 samples) will be added oil paint and another half without oil paint. Samples will be submitted to testing hardness, rupture resistance and permanent deformation, and 1008 hours of accelerated aging. The data obtained will be tested for adherence to the normal curve, applied the appropriate statistical test to compare the mean values of of the samples.

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)

NOBREGA, ADHARA S.; ANDREOTTI, AGDA M.; MORENO, AMALIA; SINHORETI, MARIO A. C.; DOS SANTOS, DANIELA M.; GOIATO, MARCELO C. Influence of adding nanoparticles on the hardness, tear strength, and permanent deformation of facial silicone subjected to accelerated aging. JOURNAL OF PROSTHETIC DENTISTRY, v. 116, n. 4, p. 623-629, OCT 2016. Web of Science Citations: 1.