Início
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Arquivos
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v. 1 n. 3 (2020): Edição Especial: Anais do I Congresso Brasileiro de Saúde On-line
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Anais de Evento
ESTUDO DA MODIFICAÇÃO DA SUPERFÍCIE DE DISCOS DA LIGA TI7,5MO UTILIZANDO TRATAMENTO ALCALINO E IMOBILIZAÇÃO DE PRATA
Autores
Barbara Lois Mathias de Souza
Ana Lucia do Amaral Escada
Ana Paula Rosifini Alves Claro
Palavras-chave:
Bactericida, biocompatibilidade, biomateriais, implantodontia, osseointegração
Resumo
Introdução: Por meio da interação entre a biotecnologia e a engenharia, é possível a construção de biomateriais como próteses e implantes, os quais devem ser biofuncionais e biocompatíveis. Em implantodontia, destacam-se o titânio e suas ligas, devido à estabilidade química em meio biológico e a compatibilidade mecânica com o osso. Baseado na importância da osseointegração no processo de reabilitação de implantes, a superfície rugosa influencia diretamente, otimizando o contato osso-implante. Porém, um dos desafios é manter a osseointegração e a saúde dos tecidos após a implantação. Dessa forma, as nanopartículas de prata (AgNPs) são usadas para reduzir infecções e prevenir a colonização de bactérias. Objetivo: A modificação da superfície de discos da liga Ti7,5Mo, empregando tratamento alcalino e imobilização de prata, para posterior reprodução em implantes. Material e métodos: No tratamento alcalino, os discos foram imersos em solução de hidróxido de sódio (NaOH) com concentração 5M, em banho termostatizado à 80ºC, por 72 horas, para dissolução da camada de óxido de titânio (TiO2) e formação de poros. Logo após, as amostras foram secas em estufa à 40ºC, por 24 horas. Em seguida, houve imersão dos discos em solução de nitrato de prata (AgNO3) com concentração 50mM, em estufa à 40ºC, por 18 horas, para imobilização da prata na camada porosa de TiO2. O tratamento térmico subsequente (para transformação da camada amorfa dos óxidos formados, em fase cristalina) foi feito em forno mufla EDG à 450ºC com taxa de aquecimento de 5ºC/min, durante 1 hora, sendo as amostras posteriormente caracterizadas por Microscopia Eletrônica de Varredura (MEV) e perfilometria. Resultados: Com o MEV, foi possível observar os aspectos das superfícies das amostras, como a formação de um filme nanoestruturado (com prata imobilizada – bactericida) que contribui para o contato direto entre o osso e o implante, favorecendo a ancoragem mecânica (estabilidade primária). A rugosidade dessa superfície, medida por meio da perfilometria, apresenta valor aproximado de 1,52μm, que melhora a resposta do tecido ósseo, favorecendo a adesão celular (estabilidade secundária). Conclusão: Por intermédio das técnicas empregadas nesta pesquisa, é possível a obtenção de um filme nanoestrurado com prata imobilizada, para aplicação em implantodontia.
Como Citar
Souza, B. L. M. de, Escada, A. L. do A., & Claro, A. P. R. A. (2020). ESTUDO DA MODIFICAÇÃO DA SUPERFÍCIE DE DISCOS DA LIGA TI7,5MO UTILIZANDO TRATAMENTO ALCALINO E IMOBILIZAÇÃO DE PRATA. Revista Multidisciplinar Em Saúde , 1 (3), 5. Recuperado de https://editoraime.com.br/revistas/rems/article/view/302
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SubmissionSearch.retrieveResults(Object:Request, Object:Journal, Array[1], null, null, null, Object:DBResultRange, Array[1]) % line 92, file: RecommendBySimilarityPlugin.inc.php
RecommendBySimilarityPlugin.callbackTemplateArticlePageFooter(Templates::Article::Footer::PageFooter, Array[3]) % line 107, file: HookRegistry.inc.php
HookRegistry.call(Templates::Article::Footer::PageFooter, Array[3]) % line 1267, file: PKPTemplateManager.inc.php
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PKPPageRouter.route(Object:Request) % line 143, file: Dispatcher.inc.php
Dispatcher.dispatch(Object:Request) % line 281, file: PKPApplication.inc.php
PKPApplication.execute() % line 68, file: index.php