Radiopacity and cytotoxicity of Portland cement associated with niobium oxide micro and nanoparticles
J. appl. oral sci
; 22(6): 554-559, Nov-Dec/2014. tab, graf
Article
em En
| LILACS, BBO
| ID: lil-732588
Biblioteca responsável:
BR1.1
ABSTRACT
Objective Mineral Trioxide Aggregate (MTA) is composed of Portland Cement (PC) and bismuth oxide (BO). Replacing BO for niobium oxide (NbO) microparticles (Nbµ) or nanoparticles (Nbη) may improve radiopacity and bioactivity. The aim of this study was to evaluate the radiopacity and cytotoxicity of the materials 1) PC; 2) White MTA; 3) PC+30% Nbµ; 4) PC+30% Nbη. Material and Methods For the radiopacity test, specimens of the different materials were radiographed along an aluminum step-wedge. For cell culture assays, Saos-2 osteoblastic-cells (ATCC HTB-85) were used. Cell viability was evaluated through MTT assay, and bioactivity was assessed by alkaline phosphatase activity assay. Results The results demonstrated higher radiopacity for MTA, followed by Nbµ and Nbη, which had similar values. Cell culture analysis showed that PC and PC+NbO associations promoted greater cell viability than MTA. Conclusions It was concluded that the combination of PC+NbO is a potential alternative for composition of MTA. .
Palavras-chave
Texto completo:
1
Índice:
LILACS
Assunto principal:
Óxidos
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Silicatos
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Compostos de Cálcio
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Compostos de Alumínio
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Cimentos Dentários
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Nanopartículas
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Nióbio
Tipo de estudo:
Risk_factors_studies
Limite:
Humans
Idioma:
En
Revista:
J. appl. oral sci
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2014
Tipo de documento:
Article