Journal article
Comparison of different etch-and-rinse adhesive systems based on shear fatigue dentin bond strength and morphological features the interface
Dental materials, Vol.37(3), pp.e109-e117
03/2021
DOI: 10.1016/j.dental.2020.11.006
PMID: 33248806
Abstract
The aim of this study was to investigate dentin bonding durability of different etch-and-rinse (ER) adhesive systems under fatigue stress and to compare morphological features of resin/dentin interfaces using SEM.
Two three-step ER adhesives, a two-step ER adhesive, and a universal adhesive in ER mode were evaluated. Before application of either primer or adhesive, phosphoric acid etching of human dentin was completed. Fifteen bonded specimens for each adhesive system were stored in distilled water at 37 °C for 24 h, then subjected to a shear bond strength (SBS) test. Bonding durability was assessed from the perspective of biomechanical stress. 25 bonded specimens for each adhesive system were subjected to shear fatigue strength (SFS) testing with a repeated subcritical load at a frequency of 20 Hz for 50,000 cycles or until failure.
Mean SBS and SFS values ranged from 33.3 to 41.2 MPa, and from 18.3 to 20.3 MPa, respectively. Three-step adhesives showed higher SBS and SFS values than the other adhesive systems. Under SEM, resin tags in different adhesive systems showed similar features, but morphology below the hybrid layer was material dependent. The universal adhesive in ER mode showed an obvious thin, high-density reaction layer below the hybrid layer.
Three-step adhesives showed higher dentin bond durability than the other ER adhesives; no significant differences in SFS were found between the universal adhesive in ER mode and the three-step ER adhesives. The results of this in vitro study indicate that some ER adhesives might establish chemical bonding with intact dentin below the hybrid layer in addition to micromechanical retention.
Details
- Title: Subtitle
- Comparison of different etch-and-rinse adhesive systems based on shear fatigue dentin bond strength and morphological features the interface
- Creators
- Yuta Kasahara - Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, JapanToshiki Takamizawa - Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, JapanEizo Hirokane - Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, JapanAkimasa Tsujimoto - Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, JapanRyo Ishii - Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, JapanWayne W Barkmeier - Department of General Dentistry, Creighton University School of Dentistry, Omaha, Nebraska, USAMark A Latta - Department of General Dentistry, Creighton University School of Dentistry, Omaha, Nebraska, USAMasashi Miyazaki - Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan
- Resource Type
- Journal article
- Publication Details
- Dental materials, Vol.37(3), pp.e109-e117
- Publisher
- Elsevier Inc
- DOI
- 10.1016/j.dental.2020.11.006
- PMID
- 33248806
- ISSN
- 0109-5641
- eISSN
- 1879-0097
- Grant note
- DOI: 10.13039/501100001691, name: Japan Society for the Promotion of Science
- Language
- English
- Date published
- 03/2021
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984176687202771
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