Detalhes bibliográficos
| Ano de defesa: |
2008 |
| Autor(a) principal: |
Lemes, Sandra Stival dos Santos
 |
| Orientador(a): |
Lenza, Marcos Augusto
|
| Banca de defesa: |
Lenza, Marcos Augusto,
Janson, Guilherme dos Reis Pereira,
Dias, Fátima Ribeiro |
| Tipo de documento: |
Dissertação
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal de Goiás
|
| Programa de Pós-Graduação: |
Programa de Pós-graduação em Odontologia (FO)
|
| Departamento: |
Faculdade de Odontologia - FO (RG)
|
| País: |
Brasil
|
| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://repositorio.bc.ufg.br/tede/handle/tede/4143
|
Resumo: |
The alloys used in the orthodontic therapy are subject to the corrosion process in the oral environment. Orthodontic mini-implants Ti-6Al-4V are an excellent source for intraoral anchorage; however, their corrosion resistance in the presence of fluoride is currently unknown. The purpose of this in vitro study was to evaluate the cytotoxic effects of the corrosion extracts of mini-implants Ti-6Al-4V from three different manufacturers when exposed to 200 g/L of sodium fluoride containing artificial saliva for 30, 90 or 180 days. The cytotoxic effects of their corrosion products on L929 cell culture was evaluated by MTT (3- [4,5-dimethylthiazol-2-yl]2,5-diphenyltetrazolium bromide) assay, for cell metabolism and proliferation. The extracts were not cytotoxic and the cytotoxicity assay demonstrated a similar behavior for the samples immersed in artificial saliva in the three evaluated periods. The qualitative analysis, through SEM did not show characteristics of corrosion. The results indicated that the mini-implants tested presented a high corrosion resistance and biocompatibility. |
