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KMID : 1023820160080040251
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The Journal of Advanced Prosthodontics
2016 Volume.8 No. 4 p.251 ~ p.258
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Effect of dimethyl sulfoxide on bond durability of fiber posts cemented with etch-and-rinse adhesives
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Fereshteh Shafiei
Mahtab Memarpour
Zahra Sarafraz
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Abstract
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PURPOSE : This study was undertaken to investigate whether use of an adhesive penetration enhancer, dimethyl sulfoxide (DMSO), improves bond stability of fiber posts to root dentin using two two-step etch-and-rinse resin cements.
MATERIALS AND METHODS : Forty human maxillary central incisor roots were randomly divided into 4 groups after endodontic treatment and post space preparation, based on the fiber post/cement used with and without DMSO pretreatment. Acid-etched root dentin was treated with 5% DMSO aqueous solution for 60 seconds or with distilled water (control) prior to the application of Excite DSC/Variolink II or One-Step Plus/Duo-link for post cementation. After micro-slicing the bonded root dentin, push-out bond strength (P-OBS) test was performed immediately or after 1-year of water storage in each group. Data were analyzed using three-way ANOVA and Student's t-test (α=.05).
RESULTS : A significant effect of time, DMSO treatment, and treatment × time interaction were observed (P<.001). DMSO did not affect immediate bonding of the two cements. Aging significantly reduced P-OBS in control groups (P<.001), while in DMSO-treated groups, no difference in P-OBS was observed after aging (P>.05).
CONCLUSION : DMSO-wet bonding might be a beneficial method in preserving the stability of resin-dentin bond strength over time when fiber post is cemented with the tested etch-and-rinse adhesive cements.
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KEYWORD
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Dimethyl sulfoxide, Push-out bond strength, Etch-and-rinse adhesive, Durability
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