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Assessment of compressive and diametral tensile strengths of carbon nanotubes reinforced glass ionomer cements

Grant number: 12/22518-9
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): April 01, 2013
Effective date (End): March 31, 2014
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal Investigator:Eduardo Bresciani
Grantee:Patrícia Uchôas Barbosa
Host Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil


The main drawback for the success of restorations performed by the Atraumatic Restorative Treatment (ART) technique is related to the mechanical properties of the employed materials, the glass ionomer cement (GICs). Many studies report attempts to improve these properties, either by particle incorporation or ultrasound command set. The advent of nanotechnology introduced carbon nanotubes, which present good mechanical resistance and resilience, as well as biocompatibility with bone tissue. Therefore, in order to try to improve the mechanical properties of GICs, the aim of this study is to evaluate the effect of functionalized carbon nanotubes incorporation into conventional and high viscous GICs, through the compressive and diametral tensile strength tests. Specimens with dimensions of 6mm in height and 4mm in diameter for compressive strength on test and 2x4mm for diametral tensile strength will be fabricated. Two GICs will be tested, Ionofil Plus (conventional) and Ionofil Molar (high viscosity). Each group of different materials will be divided into two subgroups according to the incorporation of nanotubes or not. The specimens will be fabricated using a metallic mold and further stored in distilled water for 24 hours. Data will be compared through two-way ANOVA and Tukey's tests, with 5% of the significance level. (AU)

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