An In Vitro Evaluation of the Effect of Dimethyl Sulfoxide Pre-Treatment on the Bond Strength of Fiber Post

Abstract

Background: The purpose of this in vitro study was to evaluate the efficacy of dimethyl sulfoxide pre-treatment of dentin on the bond strength of fiber post. Methods: Twenty single rooted mandibular premolar teeth were decoronated and shaping and cleaning was done till Protaper gold F3. After obturation, the teeth were sealed using type II GIC and stored in the distilled water for one week. Post space preparation was done using peeso reamer to a depth of 12 mm with 5 mm of remaining gutta percha in the apical portion of all samples and post space was etched with 37% phosphoric acid. The specimens were divided into two groups with 10 teeth each in group A (DMSO group) and group B (Control). In the group A, the post space was treated with 1 mL of 50% v/v dimethyl sulfoxide (DMSO) and in group B (control), the post space was treated with 1 mL of distilled water for 60 seconds with the help of paper points. Etch and rinse resin cement (Variolink II, IvoclarVivadent) was used following the manufacturer’s instructions. Fibre posts were coated with cement and placed into the post space and light cured. Push out strength of samples was performed using universal testing machine. Results: Statistical analysis of the data showed no significant difference in push out bond strength between the control group and pre-treated group. Conclusion: This in vitro study showed that there was no significant difference in the immediate bond strength scores of 50% v/v dimethyl sulfoxide pre-treated group when compared to control group. Keywords: Dentin, Dimethyl sulfoxide, Dowel, Resin cements