Microshear Bond Strength of Resin Composite to Pretreated Dentin with Silver Diamine Fluoride/Potassium Iodide: An In Vitro Study

摘要

The aim of this in vitro study was to evaluate the microshear bond strength of total etch adhesives to pretreated dentin with silver diamine fluoride (SDF) or silver diamine fluoride/potassium iodide (SDF/KI) and to evaluate the mode of bond failure under scanning electron microscope (SEM). Forty five dentin specimens were prepared from extracted human permanent premolars and divided into three groups (n = 15) based on the dentin surface treatment as follows: Control group (A) : total etch bonding system ;group (B) SDF pretreatment of etched dentin followed by bonding system and group (C) SDF/KI pretreatment of etched dentin followed by bonding system . Resin composite cylinder was built on the dentin slabs to a height of 4 mm and dentincomposite cross section is approximately 0.8 mm. The prepared specimens were subjected to microshear bond strength analysis, and evaluation of the mode of failure of fractured surface was observed under SEM. Statistical Analysis: One-way ANOVA followed by Tukey’s post hoc multiple comparison tests. Group C was found to have the highest mean value of microshear bond strength followed by a mean value of group A then group, B mean value. The difference between all group was nonsignificant as shown by the non-significant one-way ANOVA Tukey and post-hoc (P>0.05). The predominant mode of failure was adhesive followed by cohesive in resin and mixed. Dentin Pretreatment with SDF or SDF/KI then dentin surface washing showed non-significant effect on the microshear bond strength of resin composite to dentin.