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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Viapiana, R. [1] ; Flumignan, D. L. [2] ; Guerreiro-Tanomaru, J. M. [1] ; Camilleri, J. [3] ; Tanomaru-Filho, M. [1]
Total Authors: 5
[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
Total Affiliations: 3
Document type: Journal article
Source: International Endodontic Journal; v. 47, n. 5, p. 437-448, MAY 2014.
Web of Science Citations: 28

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)

FAPESP's process: 10/17976-2 - Physico-chemical and mecanichal evaluation of mineral trioxide aggregate based root canal sealers in comparison to AH Plus and Sealapex.
Grantee:Raqueli Viapiana
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 10/10769-1 - Physical, chemical, mechanical and biological properties evaluation of MTA and Portland cement associated with micro and nanoparticulate radiopacifiers
Grantee:Mario Tanomaru Filho
Support type: Regular Research Grants
FAPESP's process: 12/11035-7 - Chemical microstructure analisys and sealing ability of MTA-based root canal sealers under different humidity environmental conditions
Grantee:Raqueli Viapiana
Support type: Scholarships abroad - Research Internship - Doctorate