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(Referência obtida automaticamente do SciELO, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Improving the Radiopacity of Calcium Aluminate Cement Based Blends

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Autor(es):
Ivone Regina de Oliveira [1] ; Gabriela do Vale Vieira [1] ; Kennedy Wallace dos Santos [1] ; Leandro José Raniero [4] ; Larissa Moreira Castro-Raucci [3] ; Paulo Tambasco de Oliveira [3] ; Celso Israel Fornari [4] ; Victor Carlos Pandolfelli [5]
Número total de Autores: 8
Afiliação do(s) autor(es):
[1] Univ Vale Paraiba, Inst Pesquisa & Desenvolvimento, Ave Shishima Hifumi 2911, Sao Jose Dos Campos, SP - Brazil
[2] Universidade do Vale do Paraíba. Instituto de Pesquisa e Desenvolvimento - Brasil
[3] Univ Sao Paulo, Fac Odontol Ribeirao Preto, Ave Cafe S-N, Ribeirao Preto, SP - Brazil
[4] Inst Nacl Pesquisas Espaciais, Lab Associado Sensores & Mat, BR-12245970 Sao Jose Dos Campos, SP - Brazil
[5] Univ Fed Sao Carlos UFSCar, Dept Engn Mat, Rod Washington Luiz, Km 235, Sao Carlos, SP - Brazil
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 21, n. 2 2018-01-22.
Resumo

The radiopacity of CAC-based compositions containing additives (ZnO, Ag and Bi2O3) was evaluated by optical density measurements, cold crushing strength, apparent porosity, pore size distribution, in vitro apatite-formation ability (bioactivity) and cell viability. The bioactivity was assessed via pH and calcium concentration measurements in simulated body fluid (SBF) for samples previously treated or not with sodium silicate (SS) solution. The surface of the samples after treatment was analyzed by scanning electron microscopy, energy dispersive X-ray analysis and confocal Raman spectroscopy. Cell viability was evaluated by MTT and alkaline phosphatase (ALP) activity. Radiopacity results confirmed that compositions containing ZnO-Ag (25:1 wt%) and ZnO-Bi2O3 (15:10 wt%) presented suitable values of radiopacity (> 3 mmAl). The identification of calcium and mainly phosphorus by EDX, highlighted the generation of an apatite-like layer on the compositions' surface after immersion in SBF or SBF/SS. CAC-blend containing 25 wt% ZnO, ZnO-Ag and ZnO-Bi2O3 presented slightly lower cell viability compared to the positive control. (AU)

Processo FAPESP: 16/22366-5 - Estudo das propriedades do isolante topológico Bi2Te3 crescido por epitaxia de feixe molecular
Beneficiário:Celso Israel Fornari
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 16/15032-3 - Caracterização in vitro e in vivo de blendas a base de cimento aluminoso visando aplicação no reparo e regeneração do tecido ósseo
Beneficiário:Ivone Regina de Oliveira
Linha de fomento: Auxílio à Pesquisa - Regular