Chemical and structural characterization of high-plasticity reparative cements

• Grant number: 18/06515-6
• Support type: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): August 01, 2018
• Effective date (End): August 31, 2019
• Field of knowledge: Health Sciences - Dentistry
• Principal Investigator: Marina Angélica Marciano da Silva
• Grantee: Gabriela Fernanda Bombarda
• Home Institution: Faculdade de Odontologia de Piracicaba (FOP). Universidade Estadual de Campinas (UNICAMP). Piracicaba , SP, Brazil
• Associated scholarship(s): 18/16722-9 - Diffraction patterns of high-plasticity reparative cements, BE.EP.IC

Abstract

The aim of the study is to evaluate the structural and chemical properties of high plasticity tricalcium silicate cements on the market (HP MTA, Biodentine and MTA Flow) and propose the development of a new high flow cement composed of tricalcium silicate, dicalcium silicate, bismuth oxide, zinc oxide and, in its liquid, distilled water and water-soluble polymer. The hydrated and non-hydrated cements will be analyzed. The characterization will be performed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffractometer (XRD). The proposed cement will be evaluated, compared to the other cements, in relation to its properties, in which analyzes of the chemical composition of the cements in SEM, EDS and XRD will be made. The phase analysis of the chemical elements of the hydrated and non-hydrated cements will be performed in X-ray diffractometer (XRD). For the analysis of the non-hydrated cements, the powders of the cements will be placed directly in the base of reading of the equipment and compacted. The diffractometer (Rigaku, Tokyo, Japan) will use Cu K ± radiation at 40 mA and 45 kV. The results will be submitted to the normal D'Agostino and Pearson test (p <0.05) for the selection of the appropriate statistical test. (AU)