The study was reported at the 89th General Session of the International Association for Dental Research, San Diego, CA, USA, March 18, 2011.
Enamel and Dentin Bond Strengths of a New Self-Etch Adhesive System
Article first published online: 17 OCT 2011
© 2011 Wiley Periodicals, Inc.
Journal of Esthetic and Restorative Dentistry
Volume 23, Issue 6, pages 390–396, December 2011
How to Cite
WALTER, R., SWIFT, JR., E. J., BOUSHELL, L. W. and BRASWELL, K. (2011), Enamel and Dentin Bond Strengths of a New Self-Etch Adhesive System. Journal of Esthetic and Restorative Dentistry, 23: 390–396. doi: 10.1111/j.1708-8240.2011.00465.x
This article is accompanied by commentary, Enamel and Dentin Bond Strengths of a New Self-Etch Adhesive System, Jorge Perdigão, DMD, MS, PhD. DOI 10.1111/j.1708-8240.2011.00466.x
- Issue published online: 5 DEC 2011
- Article first published online: 17 OCT 2011
Vol. 24, Issue 1, 78, Article first published online: 9 JAN 2012
Statement of Problem: Self-etch adhesives typically are mildly acidic and therefore less effective than etch-and-rinse adhesives for bonding to enamel.
Purpose: The purpose of this study was to evaluate the enamel and dentin shear bond strengths of a new two-step self-etch adhesive system, OptiBond XTR (Kerr Corporation, Orange, CA, USA).
Materials and Methods: The labial surfaces of 80 bovine teeth were ground to create flat, 600-grit enamel or dentin surfaces. Composite was bonded to enamel or dentin using the new two-step self-etch system or a three-step etch-and-rinse (OptiBond FL, Kerr), two-step self-etch (Clearfil SE Bond, Kuraray America, Houston, TX, USA), or one-step self-etch adhesive (Xeno IV, Dentsply Caulk, Milford, DE, USA). Following storage in water for 24 hours, shear bond strengths were determined using a universal testing machine. The enamel and dentin data sets were subjected to separate analysis of variance and Tukey's tests. Scanning electron microscopy was used to evaluate the effects of each system on enamel.
Results: Mean shear bond strengths to enamel ranged from 18.1 MPa for Xeno IV to 41.0 MPa for OptiBond FL. On dentin, the means ranged from 33.3 MPa for OptiBond FL to 47.1 MPa for Clearfil SE Bond. OptiBond XTR performed as well as Clearfil SE Bond on dentin and as well as OptiBond FL on enamel. Field emission scanning electron microscope revealed that OptiBond XTR produced an enamel etch pattern that was less defined than that of OptiBond FL (37.5% phosphoric acid) but more defined than that of Clearfil SE Bond or Xeno IV.
Conclusion: The new two-step self-etch adhesive system formed excellent bonds to enamel and dentin in vitro.
OptiBond XTR, a new two-step self-etch adhesive system, is a promising material for bonding to enamel as well as to dentin.
(J Esthet Restor Dent 23:390–398, 2011)