Adhesion of Epiphany self-etch sealer to dentin treated with intracanal irrigating solutions.
BACKGROUND
This in vitro study assessed the adhesion of Epiphany self-etch (SE) root canal sealer to dentin treated with different irrigation regimens.


METHODS
Flat dentin surfaces were obtained from human third molar teeth; smear layer was created on each sample. Five groups of 10 samples each were conditioned with one of the following regimens: (1) deionized water for 10 minutes; (2) 5% sodium hypochlorite (NaOCl) for 10 minutes; (3) 5% NaOCl for 10 minutes and then 10% sodium ascorbate (Na-Ascr) for 10 minutes; (4) 5% NaOCl for 10 minutes and then 2% chlorhexidine (CHX) for 5 minutes; or (5) 5% NaOCl for 10 minutes and then 10% Na-Ascr for 10 minutes, followed by 2% CHX for 5 minutes. The conditioned dentin surfaces were dried with absorbent paper points. The Epiphany SE sealer was placed on each dentin surface with the use of hollow stainless steel tubes with specific diameter and height. The samples were stored in 100% humidity at 37°C for 7 days and then tested for shear bond strength in a universal testing machine.


RESULTS
Shear bond strength data were analyzed by one-way analysis of variance and Tukey post hoc tests (P < .05). There were statistically significant differences among the groups.


CONCLUSIONS
NaOCl decreased the bond strength of Epiphany SE sealer to dentin, whereas the use of Na-Ascr reversed this negative effect of NaOCl. CHX had neither negative nor positive influence on the bond strength.
Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan. nassarnar@gmail.com
Mohannad
M
Nassar
Lama
L
Awawdeh
Ahmed
A
Jamleh
Alireza
A
Sadr
Junji
J
Tagami
D000704:Analysis of Variance; D001205:Ascorbic Acid / Q000494:pharmacology; D002710:Chlorhexidine / Q000494:pharmacology; D001840:Dental Bonding / Q000379:methods*; D003763:Dental Leakage / Q000517:prevention & control; D018772:Dental Marginal Adaptation; D003804:Dentin / Q000187:drug effects*; D004347:Drug Interactions; D004359:Drug Therapy, Combination; D006801:Humans; D008963:Molar; D012387:Root Canal Filling Materials / Q000494:pharmacology*; D012388:Root Canal Irrigants / Q000494:pharmacology*; D033081:Shear Strength; D012973:Sodium Hypochlorite / Q000494:pharmacology*; D018709:Statistics, Nonparametric
D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; C486893:epiphany sealer; D012973:Sodium Hypochlorite; D001205:Ascorbic Acid; D002710:Chlorhexidine