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

Baldi, J. V. ; Bernardes, R. A. ; Duarte, M. A. H. ; Ordinola-Zapata, R. ; Cavenago, B. C. ; Moraes, J. C. S. ; de Moraes, I. G.

International endodontic journal, 2012-10, Vol.45 (10), p.915-920 [Periódico revisado por pares]

Oxford, UK: Blackwell Publishing Ltd

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  • Título:
    Variability of physicochemical properties of an epoxy resin sealer taken from different parts of the same tube
  • Autor: Baldi, J. V. ; Bernardes, R. A. ; Duarte, M. A. H. ; Ordinola-Zapata, R. ; Cavenago, B. C. ; Moraes, J. C. S. ; de Moraes, I. G.
  • Assuntos: AH Plus ; Analysis of Variance ; Chemical Phenomena ; Contrast Media ; degree of conversion ; Dentistry ; Epoxy Resins - chemistry ; Epoxy Resins - standards ; Hydrodynamics ; Materials Testing ; physicochemical properties ; Polymerization ; radiopacity ; Resin Cements - chemistry ; Resin Cements - standards ; Root Canal Filling Materials - chemistry ; Root Canal Filling Materials - standards ; root canal sealer
  • É parte de: International endodontic journal, 2012-10, Vol.45 (10), p.915-920
  • Notas: ark:/67375/WNG-84X7LJX3-6
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    ArticleID:IEJ2049
    ObjectType-Article-1
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    content type line 23
  • Descrição: 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, 45, 915–920, 2012. 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), Tukey–Kramer, Kruskal–Wallis 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.
  • Editor: Oxford, UK: Blackwell Publishing Ltd
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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