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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.)

Variability of physicochemical properties of an epoxy resin sealer taken from different parts of the same tube

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Author(s):
Baldi, J. V. [1] ; Bernardes, R. A. [1] ; Duarte, M. A. H. [1] ; Ordinola-Zapata, R. [1] ; Cavenago, B. C. [1] ; Moraes, J. C. S. [2, 3] ; de Moraes, I. G. [1]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Bauru Dent Sch, Dept Operat Dent Dent Mat & Endodont, Bauru - Brazil
[2] Sao Paulo State Univ, Dept Phys, Sao Paulo - Brazil
[3] Sao Paulo State Univ, Dept Chem, Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: International Endodontic Journal; v. 45, n. 10, p. 915-920, OCT 2012.
Web of Science Citations: 15
Abstract

Baldi JV, Bernardes RA, Duarte MAH, Ordinola-Zapata R, Cavenago BC, Moraes JCS, de Moraes IG. Variability of physicochemical properties of an epoxy resin sealer taken from different parts of the same tube. International Endodontic Journal,similar to 45, 915920, 2012. Abstract Aim To analyse several physicochemical properties of AH Plus (Dentsply DeTrey, Konstanz, Germany), including setting time, flow, radiopacity and the degree of conversion (DC); and to correlate the results with the source of the material: from the beginning, middle or end of the tubes in which they were supplied. Methodology Three experimental groups were established for each property investigated. Group 1 corresponded to material taken from the beginning of tubes A and B; Group 2 corresponded to material taken from the middle of each tube; and group 3 corresponded to that from the end of each tube. The setting time, flow and radiopacity were studied according to American National Standards Institute/American Dental Association (ANSI/ADA) Specification 57. DC was determined from infrared spectra, which were recorded at 1-h intervals for the first 6 h; then, at 2-h intervals for the next 14 h; then, at 24 and 30 h. Data were analysed statistically by analysis of variance (anova), TukeyKramer, KruskalWallis and Dunn tests, with a significance level of 5%. Results Group 1 had a significantly longer setting time (2303 +/- 1058 min) (P < 0.05). Group 3 had the lowest flowability (30.0 +/- 0.7 mm) and the highest radiopacity (14.85 +/- 1.8 mm Al) (P < 0.05). No differences were found for the DC test (P > 0.05). Conclusion The results suggest that segregation occurs between the organic and inorganic components of AH Plus sealer, thereby changing the setting time, flow and radiopacity. (AU)

FAPESP's process: 10/11854-2 - EVALUATION OF SOME PHYSICAL,CHEMICAL AND BIOLOGICAL PROPERTIES OF AH PLUS® PREPARED WITH PORTIONS OF THE BEGINNING, MIDDLE AND THE END OF OF THE TUBES
Grantee:Járcio Victório Baldi
Support Opportunities: Scholarships in Brazil - Post-Doctoral