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Evaluation of physico-chemical, mechanical and antimicrobial properties of MTA and Portland cement associated with zirconium oxide and nano-hydroxyapatite

Grant number: 12/11318-9
Support type:Scholarships in Brazil - Master
Effective date (Start): November 01, 2012
Effective date (End): March 31, 2014
Field of knowledge:Health Sciences - Dentistry - Endodontics
Principal researcher:Juliane Maria Guerreiro Tanomaru
Grantee:Adinael Trindade Junior
Home Institution: Faculdade de Odontologia (FOAr). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil


Mineral Trioxide Aggregate (MTA) has Portland cement (PC) in its basic composition. Zirconium oxide (ZrO) has been associated with the PC to provide radiopacity, placing bismuth oxide; and the addition of nano-hydroxyapatite (n-HA) getting the biological and antimicrobial properties facilitated. The aim of this study is to evaluate and compare the physical, chemical, mechanical and antimicrobial properties of MTA and associations of PC bring on different concentrations of n-HA and ZrO divided into the following groups: G1 - White MTA (Angelus, Brazil); G2 - PC + ZrO 30%; G3 - PC 60% + n-HA 10% + ZrO 30%; G4 - PC 50% + n-HA 20% + Zr 30%. To the pH test, the samples will be immersed in water and the measurements will be performed by Digimed pH meter as well. Regarding the solubility test, will be analyzed the material's mass loss percentage after the material immersion in deionized water. The setting time test is carried out by pattern Gilmore needle. For compression resistance test, samples will be tested with a mechanical test machine. The antimicrobial properties will be realized by the direct contact test over plantonic cell and Enterococcus faecalis biofilm. Bacterial suspension evaluation will be performed by measurement on spectrophotometry and the biofilm test by CFU/ml. Data will be submitted to ANOVA and Tukey's test, with significance level of 5% or the second test indicated the data obtained. (AU)

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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)
FERNANDO VAZQUEZ-GARCIA; MÁRIO TANOMARU-FILHO; GISSELLE MORAIMA CHÁVEZ-ANDRADE; ROBERTA BOSSO-MARTELO; MARIA INÊS BASSO-BERNARDI; JULIANE MARIA GUERREIRO-TANOMARU. Effect of Silver Nanoparticles on Physicochemical and Antibacterial Properties of Calcium Silicate Cements. Brazilian Dental Journal, v. 27, n. 5, p. 508-514, . (12/11318-9, 12/13271-0)

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