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
Dans Anglais
| 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. .
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Oxydes
/
Silicates
/
Composés du calcium
/
Composés de l'aluminium
/
Ciments dentaires
/
Nanoparticules
/
Niobium
Type d'étude:
Facteurs de risque
Limites du sujet:
Humains
langue:
Anglais
Texte intégral:
J. appl. oral sci
Thème du journal:
Dentisterie
Année:
2014
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
Univ. Estadual Paulista/BR
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