| Title | Microtensile bond strength of etch-and-rinse and self-etching adhesives to intrapulpal dentin after endodontic irrigation and setting of root canal sealer. | | Author(s) | Wattanawongpitak N, Nakajima M, Ikeda M, Foxton RM, Tagami J | | Institution | Department of Restorative Dentistry, Faculty of Dentistry, Naresuan University, Tambon Thaphoe, Amphor Muang, Phitsanulok, Thailand. nipapornhw@gmail.com | | Source | J Adhes Dent 2009 Feb; 11(1):57-64. | | MeSH | Acid Etching, Dental
Bisphenol A-Glycidyl Methacrylate
Calcium Hydroxide
Composite Resins
Dental Bonding
Dental Materials
Dental Pulp Cavity
Dental Stress Analysis
Dentin
Dentin-Bonding Agents
Edetic Acid
Humans
Humidity
Materials Testing
Resin Cements
Root Canal Filling Materials
Root Canal Irrigants
Salicylates
Sodium Hypochlorite
Stress, Mechanical
Temperature
Tensile Strength
Time Factors
| | Abstract | PURPOSE: To evaluate the effect of endodontic irrigation regimens and calcium hydroxide root canal sealer (Sealapex) on the microtensile bond strengths (muTBS) of dual-curing resin composite (Clearfil DC Core Automix) to the intrapulpal dentin.
MATERIALS AND METHODS: Forty standardized coronal-half root canal dentin specimens obtained from human premolars were divided into 4 groups: group A, no treatment (control); group B, Sealapex; group C, NaOCl/Sealapex; group D, EDTA/NaOCl/Sealapex. After 7 days of storage in 100% relative humidity, Sealapex was removed. Dentin surfaces were bonded with adhesives, either etch-and-rinse (Single Bond) or self-etching (Clearfil SE Bond), and built up with resin composite. The bonded specimens were trimmed into an hourglass shape with a 1-mm2 cross-sectional area for microtensile testing (n = 20). The muTBS to intrapulpal dentin was analyzed using two-way ANOVA and Dunnett's TC test. Two teeth of each group were prepared for micromorphological analysis of dentin surface.
RESULTS: The root canal sealer with or without endodontic irrigation significantly affected the bond strengths of resin composite to intrapulpal dentin compared with the control group (p < 0.05). There were no significant differences in muTBS of each experimental group between etch-and-rinse and self-etching adhesives (p > 0.05). The dentin surface was covered with a mud-like material after sealer application for 7 days.
CONCLUSION: The root canal sealer reduced the muTBS of dual-curing resin composite with etch-and-rinse and self-etching adhesive systems to intrapulpal dentin. Treatment with EDTA followed by NaOCI prior to obturation caused an additional reduction in muTBS of both adhesive systems to intrapulpal dentin. | | Language | eng | | Pub Type(s) | Comparative Study
Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't
| | PubMed ID | 19343928 |
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