Effect of surface preparation on microtensile bond strength of three adhesive systems to bovine enamel.
OBJECTIVE
The purpose of this study was to compare the microtensile bond strength (microTBS) of three adhesives to bovine enamel prepared with 600-grit silicon carbide paper, diamond rotary instrument, or carbide bur.


METHODS
Bovine teeth (n = 36) were randomly divided into three treatment groups and bonded using a total-etch adhesive (Single Bond, 3M ESPE), a self-etching primer system (Clearfil SE Bond, Kuraray), or a self-etching adhesive (One-Up Bond F, Tokuyama). A 4-mm composite crown was built on the bonded surfaces and specimens were stored in water for one day at 37 degrees C. Specimens were sectioned into 0.7-mm-thick slabs, trimmed to a cross-sectional area of 1 mm2, and loaded to failure at a crosshead speed of 1 mm/min using a tabletop tester (EZ-Test, Shimadzu). Microtensile bond strength data were analyzed using ANOVA and Fisher's PLSD test (alpha = 0.05).


RESULTS
The bond strength of each self-etching system was lower when the enamel was prepared using a diamond or carbide bur, rather than with 600-grit silicon carbide paper. Differences in microTBS between carbide- and diamond-prepared surfaces were not significant. The surface preparation method did not affect the total-etch system.


CONCLUSIONS
Different preparation instruments are unlikely to affect resin-enamel bond strengths.
Dias
Walter R L
WR
Department of Operative Dentistry, School of Dentistry, University of North Carolina, Chapel Hill, North Carolina 27599-7450, USA.
Pereira
Patricia N R
PN
Swift
Edward J
EJ
D000818:Animals; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry*; D002417:Cattle; D003737:Dental Cavity Preparation / Q000295:instrumentation*; D003743:Dental Enamel / Q000737:chemistry*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D008422:Materials Testing / Q000379:methods; D008689:Methacrylates / Q000737:chemistry*; D019279:Resin Cements / Q000737:chemistry*; D013499:Surface Properties; D013718:Tensile Strength
C438313:Clearfil SE Bond; D017220:Dentin-Bonding Agents; D008689:Methacrylates; C446260:One-Up-Bond F; D019279:Resin Cements; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate