Improving the performance of EndoRez root canal sealer with a dual-cured two-step self-etch adhesive. I. Adhesive strength to dentin.
This study examined the hypotheses that the use of a self-etching-adhesive improves the adhesion of EndoRez to dentin, and that both techniques are unaffected by the prolonged use of NaOCl when EDTA is used as the final rinse. A tensile bond testing design was employed with composite cylinders bonded to dentin using: (a) 17% EDTA-2 min/EndoRez; (b) 6.15% NaOCl-1 h/EDTA-2min/EndoRez; (c) EDTA-2 min/Clearfil Liner Bond 2V/EndoRez; and (d) NaOCl-1 h/EDTA-2min/Clearfil Liner Bond 2V/EndoRez. Fractographic analyses of debonded specimens were performed using SEM. Two-way ANOVA and Tukey test revealed higher tensile bond strengths with the self-etching-adhesive-modified EndoRez technique (p < 0.001). Sealer tags pulled away from dentinal tubules when EndoRez was used alone, whereas mixed failures occurred within sealer tags, hybrid layers, adhesive, and sealer in the self-etching-adhesive-modified EndoRez technique. Both techniques were unaffected by the prolonged use of NaOCl (p > 0.05) when EDTA was employed as the final rinse.
Doyle
Michael D
MD
Department of Endodontics, School of Dentistry, Medical College of Georgia, Augusta, Georgia 30912-1129, USA.
Loushine
Robert J
RJ
Agee
Kelli A
KA
Gillespie
William T
WT
Weller
R Norman
RN
Pashley
David H
DH
Tay
Franklin R
FR
D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry*; D004492:Edetic Acid / Q000009:adverse effects*; D006801:Humans; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012388:Root Canal Irrigants / Q000009:adverse effects*; D012973:Sodium Hypochlorite / Q000009:adverse effects*; D018709:Statistics, Nonparametric; D013718:Tensile Strength
D003188:Composite Resins; C481259:EndoRez; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; D004492:Edetic Acid; D012973:Sodium Hypochlorite