Physicochemical properties of calcium silicate cements associated with microparticulate and nanoparticulate radiopacifiers

Autor(es)

Bosso-Martelo, Roberta ^[1] ; Guerreiro-Tanomaru, Juliane M. ^[1] ; Viapiana, Raqueli ^[1] ; Berbert, Fabio Luiz C. ^[1] ; Hungaro Duarte, Marco Antonio ^[1] ; Tanomaru-Filho, Mario ^[1]

Afiliação do(s) autor(es)

^[1] Araraquara Sch Dent, Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CLINICAL ORAL INVESTIGATIONS; v. 20, n. 1, p. 83-90, JAN 2016.
• Citações Web of Science: 16

Resumo

The objective of this paper was to evaluate the physicochemical properties of calcium silicate cements with different chemical compositions, associated with radiopacifying agents. Mineral trioxide aggregate (MTA) Angelus, calcium silicate cement with additives (CSC), and resinous calcium silicate cement (CSCR) were evaluated, with the addition of the following radiopacifiers: microparticles (micro) or nanoparticles (nano) of zirconium oxide (ZrO2), niobium oxide (Nb2O5), bismuth oxide (Bi2O3), or calcium tungstate (CaWO4). Setting time was evaluated using Gilmore needles. Solubility was determined after immersion in water. The pH and calcium ion release were analyzed after 3, 12, and 24 h and 7, 14, and 21 days. The data obtained were submitted to analysis of variance and Tukey's test, at a level of significance of 5 %. CSC + CaWO4 and CSCR + ZrO2 micro, Nb2O5 and CaWO4 presented results similar to MTA, with a shorter final setting time than the other associations. CSC and CSCR+ ZrO2 micro presented a higher degree of flow. All the cements evaluated presented low solubility. The materials presented alkaline pH and released calcium ions. ZrO2 micro radiopacifier may be considered a potential substitute for Bi2O3 when associated with CSC or CSCR. The proposed materials, especially when associated with ZrO2, are potential materials for use as alternatives to MTA. (AU)

• Processo FAPESP: 11/18239-4 - Avaliação físico-química, mecânica, de biocompatibilidade e bioatividade de diferentes formulações de cimento Portland e associações a agentes radiopacificadores micro e nanoparticulados
• Beneficiário: Mario Tanomaru Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 11/11292-7 - Avaliação de propriedades físico-químicas, mecânicas e biocompatibilidade de diferentes tipos de Cimento Portland e associações a radiopacificadores micro e nanoparticulados
• Beneficiário: Roberta Bosso Martelo
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto