Efeito da intensidade de fotopolimerização na biocompatibilidade e resistência à flexão de uma resina composta
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Palavras-chave

teste de materiais
resinas compostas
cultura de células

Como Citar

Efeito da intensidade de fotopolimerização na biocompatibilidade e resistência à flexão de uma resina composta. (2022). Odontoestomatología, 24(40), 1-20. https://doi.org/10.22592/ode2022n40e222

Resumo

Objetivo: Determinar o efeito da intensidade de duas unidades de fotopolimerização na biocompatibilidade, resistência à flexão e módulo de elasticidade de uma resina composta.

Metodologia: Foram fabricados dois grupos de resina composta Filtek Z250XT, cada um deles foi fotopolimerizado com intensidades diferentes (<400 mW/cm2 por 40s e > 800 mW/cm2 por 20s). A viabilidade celular foi analisada por ensaio de MTT em 24 e 48 horas seguindo a norma ISO 10993-5. A resistência à flexão e o módulo de elasticidade foram analisados ​​seguindo a norma ISO 4049.

Resultados: No grupo fotopolimerizado com intensidade <400mW/cm2, a citotoxicidade foi estatisticamente maior nas 24 e 48 horas e a resistência à flexão e o módulo de elasticidade foram estatisticamente menores.

Conclusão: Uma intensidade de polimerização <400 mW/cm2 aumenta os níveis de citotoxicidade e diminui as propriedades mecânicas das resinas compostas. Destaca-se a importância do controle periódico das unidades de fotopolimerização.

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Referências

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