Radiopacity, pH and antimicrobial activity of Portland cement associated with micro- and nanoparticles of zirconium oxide and niobium oxide

Autor(es)

Guerreiro Tanomaru, Juliane Maria ^[1] ; Storto, Inara ^[1] ; da Silva, Guilherme Ferreira ^[1] ; Bosso, Roberta ^[1] ; Costa, Bernardo Cesar ^[1] ; Basso Bernardi, Maria Ines ^[2] ; Tanomaru-Filho, Mario ^[1]

Afiliação do(s) autor(es)

^[1] UNESP, Araraquara Dent Sch, Dept Restorat Dent, BR-14801385 Araraquara, SP - Brazil

^[2] Univ Sao Paulo, Sao Carlos Phys Inst, BR-13566590 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: DENTAL MATERIALS JOURNAL; v. 33, n. 4, p. 466-470, AUG 2014.
• Citações Web of Science: 9

Resumo

The aim of this study was to evaluate some properties of the calcium silicate materials Mineral Trioxide Aggregate (MTA) and Portland cement (PC) with microparticulated (micro) and nanoparticulated (nano) zirconium oxide (ZrO2) or niobium oxide (Nb2O5). The experimental materials: White PC (PC), MTA-Angelus (R) (MTA), PC+ZrO(2)micro, PC+ZrO(2)nano, PC+Nb(2)O(5)micro and PC+Nb(2)O(5)nano were submitted to radiopacity and pH evaluations. Furthermore, the antimicrobial activity against different microorganisms was assessed by agar diffusion test. MTA presented higher radiopacity than other materials. However, all materials except PC presented higher radiopacity than recommended by ISO/ADA. MTA promoted higher pH values in all analyzed periods (p <= 0.05). At the initial periods, PC and PC+ZrO(2)micro showed pH similar to MTA. All materials showed antimicrobial activity against the evaluated microorganisms. In conclusion, ZrO2 and Nb2O5 could be alternative radiopacifiers to be added to calcium silicate materials. (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: 10/10769-1 - Avaliação de propriedades físico-químicas, mecânicas e biológicas de materiais à base de mineral trióxido agregado e cimento Portland com radiopacificadores micro ou nanoparticulados
• Beneficiário: Mario Tanomaru Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular