The effect of using silver diamine fluoride at two different times on the microshear bond strength of adhesives to sound and caries‑affected dentin

Abstract

Background: The aim of this laboratory study was to investigate the immediate and delayed
effects of silver diamine fluoride (SDF) on the microshear bond strength (μSBS) of two types of
sixth‑generation self‑etch and universal etch‑and‑rinse (ER) adhesives to sound dentin (SD) and
Caries‑Affected Dentin (CD).
Materials and Methods: In this experimental study, 120 human third molars were selected, half
of which had occlusal caries. First, the occlusal enamel was removed, and SD and CD surrounded
by SD were exposed. The samples were divided into three groups. In the first group, SDF was not
used; in the second group, SDF was applied, and in the third group, after applying SDF, the samples
were incubated in artificial saliva for 1 month. The sixth‑generation self‑etch adhesive was used in
half of the samples, and the universal ER adhesive was used in the other half. The μSBS of the samples
was measured, and the strength and type of failure were investigated. The data were analyzed using
three‑way analysis of variance (α = 0.05).
Results: The highest mean shear bond strength was observed in the SD without SDF and Clearfil
Liner Bond (LB), and the lowest mean shear bond strength was observed in the CD, LB, and Aged
SDF. The bond strength was lower in the CD than in the SD (P < 0.001). In CD, SDF caused a slight
increase in the immediate μSBS, which was not significant in any of the bonding systems. Bond
strength in the SD with Aged SDF was significantly higher in All Bond (AB) Universal than in LB
(P = 0.03).
Conclusion: Applying SDF to SD, regardless of the type of bond, decreases the bond strength,
while it increases the bond strength of CD. If SDF is used in SD, it is better to use AB and ER
bonding systems.
Key Words: Dental bonding, dental caries, dentin, silver compounds

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 Mohammadreza Malekipour: Pubmed,Google Scholar