• Yanee Tantilertanant D.D.S.
• Sirivimol Srisawasdi D.D.S., M.Sc., Ph.D.

Objective The objective of this study was to compare microleakage score of intact dentin adhesivetreated
tooth surfaces, and salivary-decontaminated ones, using current acidic primers.

Materials and methods Class V cavities were prepared on buccal surfaces of 108 extracted caries-free
human premolars, and randomly assigned to one of nine groups consisting of non-contamination of
Optibond^® FL, Optibond^® XTR, Optibond^® All in one (groups FC, XC, AC respectively), salivarydecontamination
before light-curing of those adhesives (groups FB, XB, AB respectively),
and salivary-decontamination after light-curing of the adhesives (groups FA, XA, AA respectively).
All teeth were restored with Premise^TM (A3 Body), and polished with Sof-Lex^TM Discs. After
thermocycling and immersion in methylene blue dye, the teeth were sectioned and evaluated using
5-interval scores under a stereomicroscope with the magnification of 20x. Medians of microleakage
score were analyzed using Kruskal-Wallis and Mann-Whitney tests at 95% confidence.

Results Medians of microleakage score of groups FB and FA were statistically significantly higher
than that of group FC (p < 0.05) for both enamel and dentin margins. However, medians of groups XB
and XA showed statistically significant difference from that of group XC (p < 0.05) only for enamel
margins. Meanwhile, for both enamel and dentin, there was no statistical difference among groups AC,
AB, AA.

Conclusion Within the limitations of this in vitro study, decontamination of saliva-contaminated
enamel and dentin margins using Optibond^® FL primers was not successful, whereas salivary
contamination of Optibond^® XTR-treated dentin could be removed using its own primer. Even though,
Optibond^® All-in-one seemed to tolerate the salivary contamination during their procedures,
they gave the highest leakage score among all groups.

(CU Dent J. 2014;37:1-14)