Banca de DEFESA: EVELYNN CRHISTYANN MEDEIROS DUARTE

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : EVELYNN CRHISTYANN MEDEIROS DUARTE
DATE: 27/08/2021
TIME: 14:00
LOCAL: Departamento de Odontologia via Meet - https://meet.google.com/zua-ffyj-ofs
TITLE:

FORMULATION, PHYSICOCHEMICAL AND MICROBIOLOGICAL ANALYSIS OF ENDODONTIC BIOACTIVE CEMENTS

KEY WORDS:

Mineral trioxide aggregate; Portland cement; Chemical composition; Clinical applications.

PAGES: 113
BIG AREA: Ciências da Saúde
AREA: Odontologia
SUBÁREA: Endodontia
SUMMARY:

Endodontic bioactive cements have clinical practices due to their biological properties, such as bioactivity; high sealing capacity; antimicrobial action; release of calcium ions, in addition to not presenting an inflammatory response or being well reduced. Based on benefits, this study aimed to develop and characterize low-cost, antimicrobially effective endodontic repairing bioactive cements for use in endodontics. For this, some formulations containing fine cements, ground slag and cellulose were prepared. These cements were compared with Angelus® repair white MTA. It is then divided into four groups: Group 1 (gray fine cement with gray ground slag - MZVI and cellulose); Group 2 (white gray cement, white ground slag - MPW and cellulose); Group 3 (white fine cement and cellulose) and Group 4 (white MTA, Angelus - positive control). The aids of each group were submitted to X-Ray Diffraction (XRD), Thermogravimetric Analysis (TG), Derived Thermogravimetry (DTG), Scanning Electron Microscopy (SEM), Potential Hydrogeniometry (pH), Picn, Infrared Spectroscopy with Fourier Transform (FTIR) and antibacterial potential against Enterococcus faecalis through the agar diffusion test. Statistical tests were performed using SPSS. Differences between groups were verified using the ANOVA test with Tukey's post hoc, descriptive statistics and graphical analyses. After evaluating the data, it is possible to observe, mainly, the presence of calcium hydroxide, dicalcium silicate, tricalcium silicate, tricalcium aluminate and calcium carbonate. In addition, the additional cements with alkaline pH, positive antimicrobial action against Enterococcus faecalis and in the SEM analysis it was possible to observe particles of irregular dimensions with a heterogeneous distribution in the polymer matrix, contrasting with a homogeneity presented by MTA. However, in the other characteristics, the dissipative cements, in general, have a great similarity with the white MTA from Angelus. With greater emphasis on group 2, which came closest to this control. It is concluded that it is possible to formulate MTA reusing slag, maintaining its physicochemical and antimicrobial properties.

BANKING MEMBERS:
Presidente - 1879551 - FABIO ROBERTO DAMETTO
Externa ao Programa - 1059162 - LETICIA MARIA MENEZES NOBREGA
Externo à Instituição - LUÍS GERALDO VAZ - UNESP
Externo à Instituição - MARCILIO DIAS CHAVES DE OLIVEIRA - UFRN
Externo à Instituição - REINALDO DIAS DA SILVA NETO - F.M.Nassau