Corrosion resistance and cytotoxicity evaluation of ferromagnetic materials for use in dental prosthesis
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2016
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CONGRESSO LATINO AMERICANO DE ORGAOS ARTIFICIAIS E BIOMATERIAIS, 9.
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In this study, the corrosion resistance and cytotoxicity of the AISI 444 ferritic stainless steel (SS) was
investigated for dental magnetic attachments application and compared with that of a comercial universal
keeper for dental attachment (Neo-magnet System). In vitro cytotoxicity analysis was performed by the red
neutral incorporation method to evaluate one of the criteria of biocompatibility. The results showed that the
AISI 444 SS tested presents no cytotoxicity. The corrosion resistance of this SS was investigated by anodic
polarization methods and electrochemical impedance spectroscopy (EIS), in a saline phosphate buffer
solution (PBS) at 37 oC. The electronic properties of the passive film at the AISI 444 surface were evaluated
by Mott-Schottky approach. All tested materials showed passivity in the PBS médium. The NeoM steel
showed higher susceptibility to pitting than the AISI 444 SS and this was realted to its composition and
microsctructure. The oxide film on the NeoM steel was associated to a higher doping concentration than the
passive film on the AISI 444 SS.
Como referenciar
COSTA, I.; ROGERO, S.; TERADA, M.; MARQUES, R.A. Corrosion resistance and cytotoxicity evaluation of ferromagnetic materials for use in dental prosthesis. In: CONGRESSO LATINO AMERICANO DE ORGAOS ARTIFICIAIS E BIOMATERIAIS, 9., 24-27 de agosto, 2016, Foz do Iguaçu, PR. Abstract... Disponível em: http://repositorio.ipen.br/handle/123456789/27313. Acesso em: 24 Mar 2026.
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