Journal article
Effect of Phosphoric Acid Pre-etching on Fatigue Limits of Self-etching Adhesives
Operative dentistry, Vol.40(4), pp.379-395
06/01/2015
DOI: 10.2341/13-252-L
PMID: 25706611
Abstract
SUMMARY The purpose of this study was to use shear bond strength (SBS) and shear fatigue limit (SFL) testing to determine the effect of phosphoric acid pre-etching of enamel and dentin prior to application of self-etch adhesives for bonding resin composite to these substrates. Three self-etch adhesives—1) G- ænial Bond (GC Corporation, Tokyo, Japan); 2) OptiBond XTR (Kerr Corp, Orange, CA, USA); and 3) Scotchbond Universal (3M ESPE Dental Products, St Paul, MN, USA)—were used to bond Z100 Restorative resin composite to enamel and dentin surfaces. A stainless-steel metal ring with an inner diameter of 2.4 mm was used to bond the resin composite to flat-ground (4000 grit) tooth surfaces for determination of both SBS and SFL. Fifteen specimens each were used to determine initial SBS to human enamel/dentin, with and without pre-etching with a 35% phosphoric acid (Ultra-Etch, Ultradent Products Inc, South Jordan, UT, USA) for 15 seconds prior to the application of the adhesives. A staircase method of fatigue testing (25 specimens for each test) was then used to determine the SFL of resin composite bonded to enamel/dentin using a frequency of 10 Hz for 50,000 cycles or until failure occurred. A two-way analysis of variance and Tukey post hoc test were used for analysis of SBS data, and a modified t-test with Bonferroni correction was used for the SFL data. Scanning electron microscopy was used to examine the area of the bonded restorative/tooth interface. For all three adhesive systems, phosphoric acid pre-etching of enamel demonstrated significantly higher (p<0.05) SBS and SFL with pre-etching than it did without pre-etching. The SBS and SFL of dentin bonds decreased with phosphoric acid pre-etching. The SBS and SFL of bonds using phosphoric acid prior to application of self-etching adhesives clearly demonstrated different tendencies between enamel and dentin. The effect of using phosphoric acid, prior to the application of the self-etching adhesives, on SBS and SFL was dependent on the adhesive material and tooth substrate and should be carefully considered in clinical situations.
Details
- Title: Subtitle
- Effect of Phosphoric Acid Pre-etching on Fatigue Limits of Self-etching Adhesives
- Creators
- T Takamizawa - Toshiki Takamizawa, DDS, PhD, assistant professor, Operative Dentistry, Nihon University School of Dentistry, Tokyo, JapanW W Barkmeier - Wayne W Barkmeier, DDS, MS, professor, General Dentistry, dean emeritus, Creighton University School of Dentistry, Omaha, NE, USAA Tsujimoto - Akimasa Tsujimoto, DDS, PhD, assistant professor, Operative Dentistry, Nihon University School of Dentistry, Tokyo, JapanD D Scheidel - Donal D Scheidel, DDS, associate professor, Diagnostic Sciences, Creighton University School of Dentistry, Omaha, NE, USAR L Erickson - Robert L Erickson, PhD, DDS, clinical professor, General Dentistry, Creighton University School of Dentistry, Omaha, NE, USAM A Latta - Mark A Latta, DMD, MS, professor, General Dentistry, dean, Creighton University School of Dentistry, Omaha, NE USAM Miyazaki - Masashi Miyazaki, DDS, PhD, professor, Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan
- Resource Type
- Journal article
- Publication Details
- Operative dentistry, Vol.40(4), pp.379-395
- DOI
- 10.2341/13-252-L
- PMID
- 25706611
- NLM abbreviation
- Oper Dent
- ISSN
- 0361-7734
- eISSN
- 1559-2863
- Language
- English
- Date published
- 06/01/2015
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984176825802771
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