Detalhes bibliográficos
| Ano de defesa: |
2018 |
| Autor(a) principal: |
MORAES, Jaciara Ferreira
 |
| Orientador(a): |
NUNES, Gilvanda Silva
|
| Banca de defesa: |
BAUER, José Roberto de Oliveira
,
TANAKA, Auro Atsushi
|
| Tipo de documento: |
Dissertação
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal do Maranhão
|
| Programa de Pós-Graduação: |
PROGRAMA DE PÓS-GRADUAÇÃO EM QUÍMICA/CCET
|
| Departamento: |
DEPARTAMENTO DE QUÍMICA/CCET
|
| País: |
Brasil
|
| Palavras-chave em Português: |
|
| Palavras-chave em Inglês: |
|
| Área do conhecimento CNPq: |
|
| Link de acesso: |
https://tedebc.ufma.br/jspui/handle/tede/2165
|
Resumo: |
The objective of this study was to evaluate and compare the effect of the addition of two bioactive glasses to the structure of resin modified glass ionomer cements (CIVMR) in relation to the release of fluoride, calcium and phosphate ions. Two commercial CIVMRs were used: Resiglass F (or Res) and Vitro Fil LC (or VF) and two bioactive glasses: Niobiophosphate (NbG) and Bioglass (45S5). These were added to the composition of the CIVMR at concentrations of 5, 10 and 20% by weight (%), and the material without bioactive glass was used as a control. After incorporation, the material was handled according to the manufacturer's recommendations and inserted into a cylindrical stainless steel die to obtain samples of 12 mm in diameter and 2 mm in height. Solutions with different pH (4 and 7) were prepared, in which the disks were immersed. At 24 h the discs were removed and inserted into new solutions with initial pH of 4 and 7, this was repeated for 7 days. At each disc removal, the solutions were taken for analysis of the F, Ca2+ and PO4 3- ions. The groups containing the commercial (45S5) and experimental (NbG) glasses released significantly (p < 0.5) more Ca2+ and PO4 3- ions compared to the groups without bioactive glasses. In general, the VF and Res control groups and the modified groups of these same materials showed higher ionic release at acidic pH. For F-, the VF control group had a higher release value of this ion in relation to the Res control. The modified VF with 20% of 45S5 presented the highest F- release followed by the modified VF with 20% of NbG. In relation to the Ca2+ and PO4 3- ions, the Res control group released more than the VF. For Ca2+, Res and VF with 10% of 45S5 presented higher ionic release, whereas for the PO4 3- ion, the most efficient materials were VF with 20% and 10% of 45S5. The results show high applicability of these materials for use in dental procedures. |
