We are using cookies to implement functions like login, shopping cart or language selection for this website. Furthermore we use Google Analytics to create anonymized statistical reports of the usage which creates Cookies too. You will find more information in our privacy policy.
OK, I agree I do not want Google Analytics-Cookies
The Journal of Adhesive Dentistry
Login:
username:

password:

Plattform:

Forgotten password?

Registration

J Adhes Dent 21 (2019), No. 1     28. Feb. 2019
J Adhes Dent 21 (2019), No. 1  (28.02.2019)

Page 27-36, doi:10.3290/j.jad.a41923, PubMed:30799469


Bonding Quality of Etch-and-Rinse Adhesives in Root Canals upon Different Pretreatments
Xiong, Jie / Shen, Lipei / Jiang, Qingsong / Luo, Bin
Purpose: To evaluate the effect of ethanol-wet/hydrophobic resin bonding (EWB) in a simplified dehydration protocol with ultrasonic agitation (UA) of etch-and-rinse adhesives on the bonding quality in root canals.
Materials and Methods: 56 extracted human maxillary central incisors were divided into 4 groups (n = 14) according to the procedures of bonding fiber posts in root canals: A: conventional etch-and-rinse adhesive as control (All-Bond 3, Bisco); B: EWB in a simplified dehydration protocol, ie, after 100% ethanol dehydration (30 s, 3 times), ethanol/hydrophobic resin (50% bis-GMA + TEG-DMA, 50% ethanol) was applied into the root canal as a primer, followed by applying pure co-monomer adhesive; C: EWB in a standard dehydration protocol, ie, ascending concentrations of ethanol (50%, 70%, 80%, 90%) for 30 s and 100% ethanol (30 s, 3 times) for dehydration, with the remaining procedure conducted as in group B; D: EWB in a simplified dehydration protocol under ultrasonic agitation (UA), ie, 100% ethanol under ultrasonic agitation for 30 s, ethanol/hydrophobic resin as a primer applied under UA for 60 s, followed by the application of pure co-monomer adhesive. All the specimens were cemented with Duo-Link (Bisco) and immersed in artificial saliva for 24 h or thermocycled for 10,000 times. Bond strength, failure mode, and nanoleakage were evaluated. Hybrid layer and resin tags were also observed with SEM. Data were analyzed with two-way ANOVA (bond strength) and Kruskal-Wallis analysis (nanoleakage, resin tag score) (α = 0.05).
Results: Significant differences existed in bond strength (p = 0.02) and nanoleakage (p = 0.02) among groups. After 24 h and after thermocycling, group D exhibited higher bond strengths than did group B (p = 0.02 after 24 h, p = 0.03 after aging) and group A (p = 0.06 after 24 h, p = 0.04 after aging). Bond strength and nanoleakage showed no significant difference after aging (p > 0.05). There was no significant difference in resin tag scores between any of the groups, but the apical third of the roots exhibited the lowest score (p = 0.001).
Conclusion: The synergistic effects of the two pretreatment strategies (EWB in a simplified dehydration protocol and UA) improved the bonding quality. UA had a positive effect on the adhesion of the etch-and-rinse adhesives, when EWB in a simplified procedure was applied into the root canal.

Keywords: adhesion to dentin, adhesive bond strength, fiber post, ultrasound