Physicochemical and mechanical properties of zirconium oxide and niobium oxide modified Portland cement-based experimental endodontic sealers

Autor(es)

Viapiana, R. ^[1] ; Flumignan, D. L. ^[2] ; Guerreiro-Tanomaru, J. M. ^[1] ; Camilleri, J. ^[3] ; Tanomaru-Filho, M. ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Araraquara Dent Sch, Dept Restorat Dent, BR-14801903 Araraquara, SP - Brazil

^[2] Sao Paulo Fed Inst Educ Sci & Technol IFSP, Matao, SP - Brazil

^[3] Univ Malta, Fac Dent Surg, Dept Restorat Dent, Msida - Malta

• Tipo de documento: Artigo Científico
• Fonte: International Endodontic Journal; v. 47, n. 5, p. 437-448, MAY 2014.
• Citações Web of Science: 28

Resumo

AimTo evaluate the physicochemical and mechanical properties of Portland cement-based experimental sealers (ES) with different radiopacifying agents (zirconium oxide and niobium oxide micro- and nanoparticles) in comparison with the following conventional sealers: AH Plus, MTA Fillapex and Sealapex. MethodologyThe materials were tested for setting time, compressive strength, flow, film thickness, radiopacity, solubility, dimensional stability and formaldehyde release. Data were subjected to anova and Tukey tests (P<0.05). ResultsMTA Fillapex had the shortest setting time and lowest compressive strength values (P<0.05) compared with the other materials. The ES had flow values similar to the conventional materials, but higher film thickness (P<0.05) and lower radiopacity (P<0.05). Similarly to AH Plus, the ES were associated with dimensional expansion (P>0.05) and lower solubility when compared with MTA Fillapex and Sealapex (P<0.05). None of the endodontic sealers evaluated released formaldehyde after mixing. ConclusionWith the exception of radiopacity, the Portland cement-based experimental endodontic sealers presented physicochemical properties according to the specifications no 57 ANSI/ADA (ADA Professional Product Review, 2008) and ISO 6876 (Dentistry Root Canal Sealing Materials, 2012, British Standards Institution, London, UK). The sealers had setting times and flow ability that was adequate for clinical use, satisfactory compressive strength and low solubility. Additional studies should be carried out with the purpose of decreasing the film thickness and to determine the ideal ratio of radiopacifying agents in Portland cement-based root canal sealers. (AU)

• Processo FAPESP: 10/17976-2 - Avaliação físico-química e mecânica de cimentos endodônticos à base de agregado trióxido mineral em comparação ao AH Plus e Sealapex.
• Beneficiário: Raqueli Viapiana
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 12/11035-7 - Análise química microestrutural e capacidade de selamento de cimentos endodônticos à base de MTA em diferentes condições de umidade
• Beneficiário: Raqueli Viapiana
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• 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