Bond strength of simplified-step adhesives to enamel prepared with two different diamond burs.
BACKGROUND
Self-etching primers are reported to produce considerable etching on flat enamel surfaces. However, little is known about the influence of different enamel surface textures. In this study the influence of grinding enamel on bond strength of two all-in-one and one two-step adhesives was investigated.


METHODS
Resin composite was bonded to the ground enamel of extracted human third molars that was reduced 0.5 mm from the buccal or lingual surfaces using either regular- or superfine-grit diamond burs with each of the three adhesives. After 24 hours in 37 degrees C water, the specimens were sectioned into slabs of 0.7 mm thickness, trimmed to an hourglass configuration, and subjected to microtensile bond strength (MTBS) testing.


RESULTS
For all adhesive systems, MTBS to enamel ground with a regular-grit diamond bur was not significantly different from that with a superfine-grit diamond bur. The etching patterns of these adhesives were partly varied according to the aggressiveness of the adhesives.


CONCLUSIONS
The use of two different burs does not affect the tensile bond strength of the adhesives to enamel.
Sevgican
F
F
Department of Restorative Dentistry and Endodontics, School of Dentistry, Ege University, Bornova, Izmir, Turkey. figen@dishekimligi.ege.edu.tr
Inoue
S
S
Koase
K
K
Kawamoto
C
C
Ikeda
T
T
Sano
H
H
D000134:Acid Etching, Dental; D020770:Compomers / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003743:Dental Enamel / Q000648:ultrastructure*; D018130:Diamond / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D010316:Particle Size; D019279:Resin Cements / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength; D013997:Time Factors; D019246:Tooth Preparation / Q000295:instrumentation*; D014867:Water / Q000737:chemistry
C029849:Clearfil Bonding Agent; D020770:Compomers; D003188:Composite Resins; C408584:Prompt L-Pop; D019279:Resin Cements; C417842:Xeno compomer; D014867:Water; D018130:Diamond