Persistence of epoxy-based sealer residues in dentin treated with different chemical removal protocols
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Data
2013-01-01
Autores
Kuga, Milton Carlos [UNESP]
Faria, Gisele [UNESP]
Rossi, Marcos Antonio
Do Carmo Monteiro, Jardel Camilo
Bonetti-Filho, Idomeo [UNESP]
Berbert, Fábio Luiz Camargo Vilella [UNESP]
Keine, Kátia Cristina [UNESP]
Sõ, Marcus Vinicius Reis
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Resumo
The presence of residual endodontic sealer in the pulp chamber may cause discoloration of the dental crown and interfere with the adhesion of restorative materials. The aim of this study was to compare the efficacy of different solvents in removing residues of an epoxy resin-based sealer (AH Plus) from the dentin walls of the pulp chamber, by scanning electron microscopy (SEM). Forty-four bovine incisor dental crown fragments were treated with 17% EDTA and 2.5% NaOCl. Specimens received a coating of AH Plus and were left undisturbed for 5 min. Then, specimens were divided in four groups (n = 10) and cleaned with one of the following solutions: isopropyl alcohol, 95% ethanol, acetone solution, or amyl acetate solution. Negative controls (n = 2) did not receive AH Plus, while in positive controls (n = 2) the sealer was not removed. AH Plus removal was evaluated by SEM, and a score system was applied. Data were analyzed by Kruskal-Wallis and Dunn tests. None of the solutions tested was able to completely remove AH Plus from the dentin of the pulp chamber. Amyl acetate performed better than 95% ethanol and isopropyl alcohol (p < 0.05), but not better than acetone (p > 0.05) in removing the sealer from dentin. No significant differences were observed between acetone, 95% ethanol, and isopropyl alcohol (p > 0.05). It was concluded that amyl acetate and acetone may be good options for cleaning the pulp chamber after obturation with AH Plus. SCANNING 35:17-21, 2013. © 2012 Wiley Periodicals, Inc. © Wiley Periodicals, Inc.
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composites, dentistry, image analysis, SEM, surface analysis, Acetone solution, Amyl acetate, Bovine incisors, Chemical removals, Dental crowns, Dentin wall, Different solvents, Epoxy-based, Four-group, Isopropyl alcohols, Negative control, Pulp chambers, Restorative materials, Significant differences, Acetone, Composite materials, Dentistry, Epoxy resins, Esters, Ethanol, Image analysis, Lunar surface analysis, Scanning electron microscopy, Surface analysis, Pulp materials, 2 propanol, acetone, alcohol, epoxy resin, pentyl acetate, root canal filling material, solvent, chemical removal, controlled study, cow, dental procedure, dentin, incisor, nonhuman, priority journal, scanning electron microscopy, tooth crown, Animals, Cattle, Dentin, Epoxy Resins, Image Processing, Computer-Assisted, Incisor, Microscopy, Electron, Scanning, Organic Chemicals, Root Canal Filling Materials, Solvents, Composites, Epoxides, Image Analysis, Pulps, Residues, Scanning Electron Microscopy, Sealing Machines
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Scanning, v. 35, n. 1, p. 17-21, 2013.