Effect of chitosan/riboflavin modification on resin/dentin interface: Spectroscopic and microscopic investigations
Identifieur interne : 001594 ( Main/Exploration ); précédent : 001593; suivant : 001595Effect of chitosan/riboflavin modification on resin/dentin interface: Spectroscopic and microscopic investigations
Auteurs : Umer Daood [Singapour] ; Kulsum Iqbal [Singapour] ; Lorraine I. Nitisusanta [Singapour] ; Amr S. Fawzy [Singapour]Source :
- Journal of Biomedical Materials Research Part A [ 1549-3296 ] ; 2013-07.
English descriptors
- Teeft :
- Absorbent paper, Acetic acid, Adhesive dentistry, Adhesive interface, Adhesive systems, Adper singlebond, Adpertm singlebond, Alkyl group, Amide, Amide regions, Article figure, Biological properties, Biomaterials, Biomed, Biomed mater, Biomedical materials research, Bond strength, Brillar, Brillar network, Brils, Brils network structure, Brils structure, Carbodiimide crosslinked hydrogels, Chemical changes, Chitosan, Chitosan particles, Collagen, Collagen crosslinking, Collagen molecule, Collagen network, Control group, Control specimens, Corneal collagen, Corneal tissue engineering, Crosslinked, Crosslinked dentin specimens, Crosslinked specimens, Crosslinking, Crosslinking effect, Deionized water, Demineralized, Demineralized dentin, Demineralized dentin collagen, Demineralized dentin specimens, Dent, Dent mater, Dentin, Dentin collagen, Dentin collagen matrix, Dentin disc specimens, Dentin discs, Dentin specimens, Dentin surface, Dentin surfaces, Dentinal tubules, Dentistry, Different locations, Disc specimens, Experimental groups, Free amine groups, Hybrid, Hybrid layer, Hybrid layer formation, Intact collagen, Interface, Lake bluff, Mater, Matrix, Mechanical properties, Mechanical stability, Microraman analysis, National university, Occlusal enamel, Online issue, Other specimens, Phenyl group, Phosphoric acid, Preliminary results, Protein matrix, Pyridinium ring vibration, Raman, Raman analysis, Raman band, Raman intensities, Raman line, Raman results, Raman shifts, Raman spectra, Raman spectroscopy, Raman spectrum, Resin, Resin cement, Resin dentin interface, Resin tags, Room temperature, Rough texture, Singapore, Sound molars, Standardized smear layer, Subsequent consideration, Surface analysis, Tissue engineering, Triplet state, Wiley periodicals.
Abstract
The aim of this study is to investigate the morphological and chemical changes of demineralized dentin collagen‐matrix and resin/dentin interface associated with chitosan/riboflavin modification. Dentin disc specimens were prepared from sound molars, acid‐etched with 35% phosphoric acid and modified with either 0.1% riboflavin or chitosan/riboflavin (Ch/RF ratios 1:4 or 1:1) and photo‐activated by UVA. Morphological and chemical changes associated with surface modification were characterized by SEM and micro‐Raman spectroscopy. Dentin surfaces of sound molars were exposed, acid‐etched, and modified as described before. Etch‐and‐rinse dentin adhesive was applied, light‐cured, and layered with resin‐restorative composite. The resin infiltration and resin/dentin interface were characterized by micro‐Raman spectroscopy and SEM. An open‐intact collagen network‐structure, formation of uniform hybrid‐layer and higher resin infiltration were found with 0.1%RF and Ch/RF 1:4 modifications. Raman analysis revealed chemical changes and shifts in Amide bands with the modification of dentin collagen‐matrix. The use of riboflavin and chitosan/riboflavin formulations to modify dentin‐collagen matrix, with the defined ratios, stabilizes the collagen fibrillar network and enhances resin infiltration and hybrid layer formation. These preliminary results are encouraging for subsequent consideration of chitosan/riboflavin modification in adhesive dentistry. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part A, 2013.
Url:
DOI: 10.1002/jbm.a.34482
Affiliations:
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Dentin disc specimens were prepared from sound molars, acid‐etched with 35% phosphoric acid and modified with either 0.1% riboflavin or chitosan/riboflavin (Ch/RF ratios 1:4 or 1:1) and photo‐activated by UVA. Morphological and chemical changes associated with surface modification were characterized by SEM and micro‐Raman spectroscopy. Dentin surfaces of sound molars were exposed, acid‐etched, and modified as described before. Etch‐and‐rinse dentin adhesive was applied, light‐cured, and layered with resin‐restorative composite. The resin infiltration and resin/dentin interface were characterized by micro‐Raman spectroscopy and SEM. An open‐intact collagen network‐structure, formation of uniform hybrid‐layer and higher resin infiltration were found with 0.1%RF and Ch/RF 1:4 modifications. Raman analysis revealed chemical changes and shifts in Amide bands with the modification of dentin collagen‐matrix. The use of riboflavin and chitosan/riboflavin formulations to modify dentin‐collagen matrix, with the defined ratios, stabilizes the collagen fibrillar network and enhances resin infiltration and hybrid layer formation. These preliminary results are encouraging for subsequent consideration of chitosan/riboflavin modification in adhesive dentistry. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part A, 2013.</div></front></TEI><affiliations><list><country><li>Singapour</li></country><orgName><li>Université nationale de Singapour</li></orgName></list><tree><country name="Singapour"><noRegion><name sortKey="Daood, Umer" sort="Daood, Umer" uniqKey="Daood U" first="Umer" last="Daood">Umer Daood</name></noRegion><name sortKey="Fawzy, Amr S" sort="Fawzy, Amr S" uniqKey="Fawzy A" first="Amr S." last="Fawzy">Amr S. Fawzy</name><name sortKey="Fawzy, Amr S" sort="Fawzy, Amr S" uniqKey="Fawzy A" first="Amr S." last="Fawzy">Amr S. Fawzy</name><name sortKey="Fawzy, Amr S" sort="Fawzy, Amr S" uniqKey="Fawzy A" first="Amr S." last="Fawzy">Amr S. Fawzy</name><name sortKey="Iqbal, Kulsum" sort="Iqbal, Kulsum" uniqKey="Iqbal K" first="Kulsum" last="Iqbal">Kulsum Iqbal</name><name sortKey="Nitisusanta, Lorraine I" sort="Nitisusanta, Lorraine I" uniqKey="Nitisusanta L" first="Lorraine I." last="Nitisusanta">Lorraine I. Nitisusanta</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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