Journal article
Apparent conversion of adhesive resin in the hybrid layer, Part II: In situ studies of the resin-dentin bond
Journal of biomedical materials research. Part A, Vol.89(2), pp.355-362
05/2009
DOI: 10.1002/jbm.a.31954
PMID: 18431762
Abstract
Penetration and conversion of adhesives into the hybrid layer (HL) is important to the quality and longevity of the adhesive resin (AR)-dentin bond. In this study, a methodology is developed to examine the degree of conversion and relative HEMA concentration with respect to Bis-GMA using Raman spectroscopy. This methodology will be used in the future reports related to this topic. Conversion in the AR of water-stored resin-dentin samples (84% +/- 3%) agreed well with that measured in commercial adhesive (Comm Adh) resin samples after 24-h water storage (80% +/- 2% from Part 1) and was significantly higher than Comm Adh without water storage (58% +/- 3% from Part 1) (p = 0.0005). Adhesive conversion was not significantly different (p = 0.5036) through the middle of the HL, with a mean of 83% +/- 6%. HEMA mole fraction, relative to Bis-GMA, was significantly higher (p = 0.0028) in the top half of the HL (0.67 +/- 0.03), when compared to HEMA in the AR (0.60 +/- 0.01). HEMA and EDMAB were identified through GC/MS as leachable components in the aqueous 24-h storage media. The effect of this elution explains the change in conversion measurements observed between dry and water-stored conditions, which is more appropriately described as the "apparent" conversion.
Details
- Title: Subtitle
- Apparent conversion of adhesive resin in the hybrid layer, Part II: In situ studies of the resin-dentin bond
- Creators
- Yuan Zou - Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, Iowa 52242, USAJulie L P JessopSteven R Armstrong
- Resource Type
- Journal article
- Publication Details
- Journal of biomedical materials research. Part A, Vol.89(2), pp.355-362
- Publisher
- United States
- DOI
- 10.1002/jbm.a.31954
- PMID
- 18431762
- ISSN
- 1549-3296
- eISSN
- 1552-4965
- Grant note
- R03 DE 14799 / NIDCR NIH HHS
- Language
- English
- Date published
- 05/2009
- Academic Unit
- Operative Dentistry; Chemical and Biochemical Engineering
- Record Identifier
- 9984066078102771
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