Diffraction patterns of high-plasticity reparative cements

• Grant number: 18/16722-9
• Support Opportunities: Scholarships abroad - Research Internship - Scientific Initiation
• Start date: January 10, 2019
• End date: February 09, 2019
• Field of knowledge: Health Sciences - Dentistry - Endodontics
• Principal Investigator: Marina Angélica Marciano da Silva
• Grantee: Gabriela Fernanda Bombarda
• Supervisor: Josette Camilleri
• Host Institution: Faculdade de Odontologia de Piracicaba (FOP). Universidade Estadual de Campinas (UNICAMP). Piracicaba , SP, Brazil
• Institution abroad: University of Birmingham, England
• Associated to the scholarship: 18/06515-6 - Chemical and structural characterization of high-plasticity reparative cements, BP.IC

Abstract

The aim of the study is to evaluate the phase, chemical and cristalline structure of high-plasticity cements (MTA HP, Biodentine, MTA Flow, MTA Flow + 5% ZnO and an experimental tricalcium silicate cement) using x-ray diffractometry (XRD). Hydrated and non-hydrated cements will be evaluated. The samples will be prepared in the Dental School of Piracicaba. For the analysis of the non-hydrated cements, the powders will be inserted directly in the sample holder of XRD and compacted. For the analysis of hydrated cements, disc-shaped specimens 15 mm in diameter and 2 mm high will be prepared and allowed to set at 37ºC and 95% relative humidity for 24 hours. The samples will be immersed separately in HBSS for 28 days. After this period, they will be dried, vacuum dissecated and crushed to a very fine powder using an agate mortar and pestle. The powder will be adapted in the sample holder of XRD. The diffractometer (Rigaku, Tokyo, Japan) will operate using Cu K± radiation at 40 mA and 45 kV and the detector set to rotate between 15° and 45°, with a sampling width of 0.05° and scan speed of 1°/min at 15 revs/min using the Bragg Brentano method. Phase identification will be accomplished using a search-match software utilizing ICDD database (International Centre for Diffraction Data, Newtown Square, PA, USA). The results will be described accordingly to the diffraction patterns presented by each material. (AU)

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)

LAUTER ESTON PELEPENKO; FLÁVIA SAAVEDRA; THIAGO BESSA MARCONATO ANTUNES; GABRIELA FERNANDA BOMBARDA; BRENDA PAULA FIGUEIREDO DE ALMEIDA GOMES; ALEXANDRE AUGUSTO ZAIA; MARINA ANGÉLICA MARCIANO. Investigation of a modified hydraulic calcium silicate-based material – Bio-C Pulpo. Brazilian Oral Research, v. 35, 2021-06-16. (17/05096-7, 18/06515-6, 18/16722-9, 17/18413-0)

PELEPENKO, LAUTER ESTON; SAAVEDRA, FLAVIA; MARCONATO ANTUNES, THIAGO BESSA; BOMBARDA, GABRIELA FERNANDA; FIGUEIREDO DE ALMEIDA GOMES, BRENDA PAULA; ZAIA, ALEXANDRE AUGUSTO; MARCIANO, MARINA ANGELICA. Investigation of a modified hydraulic calcium silicate-based material - Bio-C Pulpo. Brazilian Oral Research, v. 35, 2021. (17/05096-7, 17/18413-0, 18/06515-6, 18/16722-9)