TY - JOUR
T1 - Variability of physicochemical properties of an epoxy resin sealer taken from different parts of the same tube
AU - Baldi, J. V.
AU - Bernardes, R. A.
AU - Duarte, M. A.H.
AU - Ordinola-Zapata, R.
AU - Cavenago, B. C.
AU - Moraes, J. C.S.
AU - de Moraes, I. G.
N1 - Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2012/10
Y1 - 2012/10
N2 - 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 6h; then, at 2-h intervals for the next 14h; then, at 24 and 30h. Data were analysed statistically by analysis of variance (anova), Tukey-Kramer, Kruskal-Wallis and Dunn tests, with a significance level of 5%. Results Group 1 had a significantly longer setting time (2303±1058min) (P<0.05). Group 3 had the lowest flowability (30.0±0.7mm) and the highest radiopacity (14.85±1.8mm 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.
AB - 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 6h; then, at 2-h intervals for the next 14h; then, at 24 and 30h. Data were analysed statistically by analysis of variance (anova), Tukey-Kramer, Kruskal-Wallis and Dunn tests, with a significance level of 5%. Results Group 1 had a significantly longer setting time (2303±1058min) (P<0.05). Group 3 had the lowest flowability (30.0±0.7mm) and the highest radiopacity (14.85±1.8mm 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.
KW - AH Plus
KW - Degree of conversion
KW - Physicochemical properties
KW - Radiopacity
KW - Root canal sealer
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U2 - 10.1111/j.1365-2591.2012.02049.x
DO - 10.1111/j.1365-2591.2012.02049.x
M3 - Article
C2 - 22486920
AN - SCOPUS:84866026420
SN - 0143-2885
VL - 45
SP - 915
EP - 920
JO - International Endodontic Journal
JF - International Endodontic Journal
IS - 10
ER -