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Enhancing glass ionomer cement features by using the calcium phosphate nanocomposite
Duarte, Ana Caroline Alves; Pereira, Rodrigo David Fernandes Cunha; Carvalho, Sandhra Maria de; Silva, Adriana Gonçalves da; Araújo, Cíntia Tereza Pimenta de; Galo, Rodrigo; Dumont, Vitor César.
  • Duarte, Ana Caroline Alves; Federal University of the Vales do Jequitinhonha e Mucuri. Department of Pediatric Clinics. Diamantina. BR
  • Pereira, Rodrigo David Fernandes Cunha; Federal University of the Vales do Jequitinhonha e Mucuri. Diamantina. BR
  • Carvalho, Sandhra Maria de; Federal University of Minas Gerais. School of Dentisry. Belo Horizonte. BR
  • Silva, Adriana Gonçalves da; FACSETE. Faculty of Dentistry of Sete Lagoas. Sete Lagoas. BR
  • Araújo, Cíntia Tereza Pimenta de; Federal University of the Vales do Jequitinhonha e Mucuri. Department of Dental Materials. Diamantina. BR
  • Galo, Rodrigo; University of São Paulo. School of Dentistry of Ribeirão Preto. Department of Prosthodontics and Dental Materials. Ribeirão Preto. BR
  • Dumont, Vitor César; FACSETE. Faculty of Dentistry of Sete Lagoas. Sete Lagoas. BR
Braz. dent. j ; 33(3): 99-108, July-Sept. 2022. tab, graf
Article in English | LILACS-Express | LILACS, BBO | ID: biblio-1384038
ABSTRACT
Abstract This study showed the synthesis of Glass ionomer cements (GIC) modified with calcium phosphate nanoparticles (nCaP). The nCaP/GIC were submitted to mechanical compression and diametral tensile tests. The biocomposite were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR). Cytotoxicity and cell viability tests were performed on the human bone marrow mesenchymal stem cells using a 3-(4,5-dimethylthiazol-2yl)2,5-diphenyl- tetrazolium-bromide assay and LIVE/DEAD assays. Statistically significant differences were observed for mechanical properties (Kruskal-Wallis, p<0.001), nCaP/GIC showed higher resistance to compression and diametral traction. The SEM analyses revealed a uniform distribution nCaP in the ionomer matrix. The EDX and XRD results indicated that hydroxyapatite and calcium β-triphosphate phases. The FTIR spectra revealed the asymmetric band of ν3PO43- between 1100-1030cm-1 and the vibration band associated with ν1PO43- in 963cm-1 associated with nCaP. The nCaP/GIC presented response to adequate cell viability and non-cytotoxic behavior. Therefore, the new nCaP/GIC composite showed great mechanical properties, non-cytotoxic behavior, and adequate response to cell viability with promising dental applications.
RESUMO
Resumo Este estudo apresenta a síntese de cimentos de ionômero de vidro (GIC) modificados com nanopartículas de fosfato de cálcio (nCaP). Os nCaP / GIC foram submetidos a ensaios mecânicos de compressão e tração diametral. Os biocompósitos foram caracterizados por microscopia eletrônica de varredura (MEV), espectroscopia de energia dispersiva de raios-X (EDX), difração de raios-X (XRD) e espectroscopia de infravermelho com transformada de Fourier (FTIR). Os testes de citotoxicidade e viabilidade celular foram realizados em células-tronco mesenquimais da medula óssea humana usando um ensaio de 3- (4,5-dimetiltiazol-2-il) 2,5-difeniltetrazólio-brometo e ensaios LIVE / DEAD. Diferenças estatisticamente significativas foram observadas para as propriedades mecânicas (Kruskal-Wallis, p <0,001), nCaP / GIC apresentou maior resistência à compressão e tração diametral. As análises de SEM revelaram uma distribuição uniforme de nCaP na matriz do ionômero. Os resultados de EDX e DRX indicaram fases de hidroxiapatita e β-trifosfato de cálcio. Os espectros de FTIR revelaram a banda assimétrica de ν3PO4 3- entre 1100-1030cm-1 e a banda de vibração associada a ν1PO4 3- em 963cm-1 associada a nCaP. O nCaP / GIC apresentou resposta adequada à viabilidade celular e comportamento não citotóxico. Portanto, o novo compósito nCaP / GIC apresentou ótimas propriedades mecânicas, comportamento não citotóxico e resposta adequada à viabilidade celular com promissoras aplicações odontológicas.


Full text: Available Index: LILACS (Americas) Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2022 Type: Article / Project document Affiliation country: Brazil Institution/Affiliation country: FACSETE/BR / Federal University of Minas Gerais/BR / Federal University of the Vales do Jequitinhonha e Mucuri/BR / University of São Paulo/BR

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Full text: Available Index: LILACS (Americas) Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2022 Type: Article / Project document Affiliation country: Brazil Institution/Affiliation country: FACSETE/BR / Federal University of Minas Gerais/BR / Federal University of the Vales do Jequitinhonha e Mucuri/BR / University of São Paulo/BR