Persistence of epoxy-based sealer residues in dentin treated with different chemical removal protocols.
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.
Department of Restorative Dentistry, Araraquara Dental School, UNESP-Univ Estadual Paulista, Araraquara, SP, Brazil.
Milton Carlos
MC
Kuga
Gisele
G
Faria
Marcos Antonio
MA
Rossi
Jardel Camilo
JC
do Carmo Monteiro
Idomeo
I
Bonetti-Filho
Fábio Luiz Camargo Vilella
FL
Berbert
Kátia Cristina
KC
Keine
Marcus Vinicius Reis
MV
Só
D000818:Animals; D002417:Cattle; D003804:Dentin / Q000187:drug effects* / Q000648:ultrastructure*; D004853:Epoxy Resins / Q000032:analysis* / Q000378:metabolism*; D007091:Image Processing, Computer-Assisted; D007180:Incisor / Q000187:drug effects / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D009930:Organic Chemicals / Q000378:metabolism / Q000494:pharmacology*; D012387:Root Canal Filling Materials / Q000032:analysis* / Q000378:metabolism*; D012997:Solvents / Q000378:metabolism / Q000494:pharmacology*
D004853:Epoxy Resins; D009930:Organic Chemicals; D012387:Root Canal Filling Materials; D012997:Solvents; C534916:epoxy resin-based root canal sealer