Effect of adhesive system type and root region on the push-out bond strength of glass-fibre posts to radicular dentine.
OBJECTIVE
To compare interfacial strength in different thirds of the root canal amongst glass-fibre posts luted with four different adhesive luting agents.


METHODS
A total of 44 extracted human single-rooted teeth were randomly divided in four groups and restored using glass-fibre posts and the following luting agents: All Bond SE/Duo-Link (ABSE), All Bond 3/Duo-Link (AB3), BisCem (BC), Clearfil ED primer II/Clearfil Esthetic Cement (CLF). One week after luting, the samples were thermocycled in water, and then embedded in acrylic resin. Three sections (cervical, middle and apical) of 2 mm thickness were prepared from each specimen, and the post in each section was subjected to a push-out test. One additional specimen for each group was prepared for scanning electron microscopy analysis and the bonding effectiveness to dentine was assessed. The data were analysed using the Kolmogorov-Smirnov test, two-way anova, one-way anova, and the Scheffe test (P < 0.05).


RESULTS
The push-out bond strength values for BC and ABSE were not significantly different (P > 0.05), but both were significantly higher than the means for AB3 and CLF (P < 0.05) in the cervical and middle regions. The same trend was observed in the apical region, except for the AB3 and ABSE which were not significantly different (P > 0.05) from each other. There were significant differences in bond strength amongst root thirds, with a reduction in values from the cervical to apical third (P < 0.05).


CONCLUSIONS
The use of BisCem and All Bond SE/Duo-Link combination with their simplified application procedures may be considered an alternative to the currently used systems for luting glass-fibre posts in root canal.
Onay
E O
EO
Department of Endodontics, Faculty of Dentistry, Baskent University, Ankara, Turkey. eonay@baskent.edu.tr
Korkmaz
Y
Y
Kiremitci
A
A
D000704:Analysis of Variance; D001840:Dental Bonding; D003786:Dental Pulp Cavity / Q000033:anatomy & histology; D003799:Dental Stress Analysis; D003804:Dentin; D017220:Dentin-Bonding Agents; D005898:Glass; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D011176:Post and Core Technique; D019279:Resin Cements; D018709:Statistics, Nonparametric
D017220:Dentin-Bonding Agents; D019279:Resin Cements; C009753:fiberglass