Coating glass-ceramics bioactive based on Nb2O5-SiOCaO- Na2O system
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2016
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INTERNATIONAL CONGRESS ON CERAMICS, 6th
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Resumo
The request for biomaterials which interact and provide proper
feedback to bodily environment is increasing and so, the need for
alternative materials development, from the process or biological
feedback points of view, is a necessity. In this context, glass and glassceramic
are interesting alternatives due to their chemical and structural
characteristics possibilities. The surface coating of a specific implant
with bioglass associated to biocide activity can lead to a significant
impact on patient life quality, reducing risks associated to prostheses
replacement due to infections, which is currently one of the most
concerning and important factors in implantology. In this work, glassceramic
materials based on SiO-CaO-Na2O system containing different
percentages of Nb2O5 were developed. Glasses were melted at 1500°C
and thermally treated at 750°C-2h. The materials were characterized by
X-Ray Diffraction (XRD), to analyses indicated partial crystallization of
glassy matrix. The Fourier Transform Infrared (FTIR) Spectroscopy and
Dilatometry also were used to structural and thermal behavior
analyses respectively. Citotoxicity tests were performed using neutral
red uptake methodology and indicated normal cell growth, which
enables the use as biomaterial. Biocide activity was evaluated through
glass-ceramic incubation in bacterial suspension (Escherichia coli) at
37°C under shaking. A composition with higher contents of SiO2 and
Nb2O5 presented higher biocide activity and coefficient of thermal
expansion (CTE) evaluated indicate thermal connection with stainless
steel 316L and titanium alloys.
Como referenciar
MELLO-CASTANHO, SONIA; SANTOS, FELIPE; BARTOLOME, JOSE; SILVA, ANTONIO. Coating glass-ceramics bioactive based on Nb2O5-SiOCaO- Na2O system. In: INTERNATIONAL CONGRESS ON CERAMICS, 6th, August 21-25, 2016, Dresden, Germany. Abstract... Disponível em: http://repositorio.ipen.br/handle/123456789/27326. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.