Adhesive Bond Strengths to Enamel and Dentin Using Recommended and Extended Treatment Times
Self-etch adhesive systems are promoted as being more efficient for bonding procedures by using fewer treatment steps to condition tooth surfaces for bonding resin-based materials. Concern has been expressed regarding the ability of the newer self-etch adhesives to yield strong, durable bonds when compared to more traditional etch-and-rinse systems. Extending the treatment time of etch-and-rinse and self-etch adhesives does not appear to result in relevant increases in the bond strength of resin composites to enamel or dentin.
Summary
This study examined the effect of different enamel and dentin conditioning times on the shear bond strength of a resin composite using etchand-rinse and self-etch adhesive systems. Shear bond strengths were determined following treatment of flat ground human enamel and dentin surfaces (4000 grit) with 11 adhesive systems: 1) AdheSE One Viva Pen–(ASE), 2) Adper Prompt LPop–(PLP), 3) Adper Single Bond Plus–(SBP), 4) Clearfil SE Bond–(CSE), 5) Clearfil S3 Bond–(CS3), 6) OptiBond All-In-One–(OBA), 7) OptiBond Solo Plus–(OBS), 8) Peak SE–(PSE), 9) Xeno IV–(X4), 10) Xeno V–(X5) and 11) XP Bond–(XPB) using recommended treatment times and an extended treatment time of 60 seconds (n=10/group). Composite (Z100) to enamel and dentin bond strengths (24 hours) were determined using Ultradent fixtures and debonded with a crosshead speed of 1 mm/minute. The data were analyzed with a three-way Analysis of Variance (ANOVA) and Fisher's LSD post hoc test. The highest shear bond strengths (MPa) to enamel were achieved by the three etch-and-rinse systems at both the recommended treatment time (SBP–40.5 ± 6.1; XPB–38.7 ± 3.7; OBS– 35.2 ± 6.2) and the extended treatment time (SBP–44.5 ± 8.1; XPB–40.9 ± 5.7; OBS–35.0 ± 4.5). Extending the enamel treatment time did not produce a significant change (p>0.05) in bond strength for the 11 adhesive systems tested. OBS generated the high- est (46.2 ± 7.9) bond strengths to dentin at the recommended treatment time. At the extended treatment time X4 (42.2 ± 11.7), PSE (42.1 ± 9.7) and OBS (41.4 ± 8.0) produced the highest bond strengths to dentin. The bond strength change between recommend and extended treatment times was significant (p<0.05) for PSE, but the other 10 systems did not exhibit any significant change.
Reference:
N. S. Kimmes, W. W. Barkmeier, R. L. Erickson, M. A. Latta (2010) Adhesive Bond Strengths to Enamel and Dentin Using Recommended and Extended Treatment Times. Operative Dentistry: January 2010, Vol. 35, No. 1, pp. 112-119
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