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
Artículo
en Inglés
| LILACS, BBO
| ID: lil-732588
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. .
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Óxidos
/
Silicatos
/
Compuestos de Calcio
/
Compuestos de Aluminio
/
Cementos Dentales
/
Nanopartículas
/
Niobio
Tipo de estudio:
Factores de riesgo
Límite:
Humanos
Idioma:
Inglés
Revista:
J. appl. oral sci
Asunto de la revista:
Odontología
Año:
2014
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Univ. Estadual Paulista/BR
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