Journal article
Influence of oxygen‐inhibited layer on dentin bond strength of chemical‐cured resin composite
European journal of oral sciences, Vol.121(5), pp.497-503
10/2013
DOI: 10.1111/eos.12077
PMID: 24028599
Abstract
This study evaluated the influence of an oxygen‐inhibited layer on the surface free energies of three single‐step self‐etch adhesives and on the bond strength of chemical‐cured resin. Adhesives were applied to bovine dentin and light irradiated, and the oxygen‐inhibited layer was either retained or removed. Surface free energies were determined by measuring the contact angles of test liquids placed on the cured adhesives. Dentin bond strengths of chemical‐cured resin with and without the oxygen‐inhibited layer were measured. Ultrastructural observation of the restorative–dentin interface was made by scanning electron microscopy. For all surfaces, values of the estimated surface tension component, Lifshitz‐Van der Waals force (γSLW), were relatively constant. Values for the Lewis acid (γS+) component increased slightly when the oxygen‐inhibited layer was removed, whereas those of the Lewis base (γS−) component decreased significantly. The bond strength of the chemical‐cured resin composite was significantly higher in specimens without an oxygen‐inhibited layer (7.6–8.0 MPa) than in those with an oxygen‐inhibited layer (4.8–5.2 MPa). Small gaps between adhesive and resin composite were found for the group with an oxygen‐inhibited layer. These results indicate that the absence of an oxygen‐inhibited layer in single‐step self‐etch adhesives promotes higher dentin bond strength of the chemical‐cured resin.
Details
- Title: Subtitle
- Influence of oxygen‐inhibited layer on dentin bond strength of chemical‐cured resin composite
- Creators
- Ayumi Yamaji - Nihon UniversityKensaku Koga - Nihon UniversityAkimasa Tsujimoto - Nihon UniversityYusuke Shimizu - Nihon UniversityKeishi Tsubota - Nihon UniversityToshiki Takamizawa - Nihon UniversityMasashi Miyazaki - Nihon University
- Resource Type
- Journal article
- Publication Details
- European journal of oral sciences, Vol.121(5), pp.497-503
- DOI
- 10.1111/eos.12077
- PMID
- 24028599
- ISSN
- 0909-8836
- eISSN
- 1600-0722
- Number of pages
- 7
- Grant note
- Young Scientists from the Japan Society for the Promotion of Science (B) (24792036; 25861813) Sato Fund Scientific Research (C) (23592810; 24592883) Dental Research Centre of Nihon University School of Dentistry, Japan
- Language
- English
- Date published
- 10/2013
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984177006402771
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