Evaluation of microshear bond strength and nanoleakage of etch‑and‑rinse and self‑etch adhesives to dentin pretreated with silver diamine fluoride/potassium iodide: An in vitro study.
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Date
2016-07
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Abstract
Aims: The aim of this in vitro study was to comparatively evaluate the microshear bond
strength (MSBS) of etch‑and‑rinse and self‑etch (ER and SE) bonding systems to dentin pretreated
with silver diamine fluoride/potassium iodide (SDF/KI) and nanoleakage at the resin‑dentin
interface using transmission electron microscope (TEM).
Subjects and Methods: Seventy‑two dentin slabs of 3 mm thickness were prepared from
extracted human permanent third molars and divided into four groups (n = 18) based on the
dentin surface treatment as follows: (1) ER adhesive bonding without dentin pretreatment; (2)
SDF/KI pretreatment of dentin followed by ER adhesive bonding; (3) SE adhesive bonding
without dentin pretreatment; and (4) SDF/KI pretreatment of dentin followed by SE adhesive
bonding. Resin composite was built on the dentin slabs to a height of 4 mm incrementally,
and dentin‑composite beams of approximately 1 mm2 cross‑sectional area were prepared. The
beams were subjected to MSBS analysis, and the fractured surface was observed under scanning
electron microscope to determine the mode of failure. The resin‑dentin interface was examined
under TEM for evaluation of nanoleakage.
Statistical Analysis Used: One‑way ANOVA followed by Tukey’s post hoc multiple comparison tests.
Results: Pretreatment of dentin with SDF/KI increased the MSBS of ER and SE adhesives, though
not statistically significant, except between Groups 2 and 3. In all the groups, the predominant
mode of failure was adhesive followed by cohesive in resin, mixed and cohesive in dentin.
TEM examination of resin‑dentin interface showed that pretreatment with 38% SDF/KI reduced
nanoleakage regardless of the type of bonding system used.
Conclusions: Pretreatment of dentin with SDF/KI minimized nanoleakage at the resin‑dentin
interface without adversely affecting the bond strength of resin composite to dentin.
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Keywords
Etch‑and‑rinse adhesives, microshear bond strength, nanoleakage, potassium iodide, self‑etch adhesives, silver diamine fluoride, transmission electron microscope
Citation
Selvaraj Karthik, Sampath Vidhya, Sujatha V, Mahalaxmi S. Evaluation of microshear bond strength and nanoleakage of etch‑and‑rinse and self‑etch adhesives to dentin pretreated with silver diamine fluoride/potassium iodide: An in vitro study. Indian Journal of Dental Research. 2016 July-Aug; 27(4): 421-425.