The Effects of Surface Treatments on Root Dentin Analyzing Microleakage of Endodontically Treated Teeth Restored with Fiber Posts

Abstract

Aim: The coronal seal is the main factor for the success of root canal treatment. This study was aimed to investigate the effects of different surface treatments of root dentin on coronal microleakage of endodontically treated teeth restored with the use of fiber posts. Materials & Method: In this in vitro study, 72 single-canal mandibular premolars were selected and their crowns were removed at CEJ. After root canal treatment and preparation of the root canal space, a #3Peeso reamer was used to prepare a post space up to a depth of 9 mm in each root canal. The samples were randomly divided into 6 groups. The root canal space of samples in each group was irrigated with distilled water, NaOCl, EDTA, NaOCl + EDTA, phosphoric acid and NaOCl + ascorbic acid, respectively. The #1 fiber post was cemented into the root canal dentin. The samples were subjected to thermo-cycled for 1500 cycles at 5 degrees C and 55 degrees C with a dwell time of 60 seconds. Subsequently, all the samples were immersed in methylene blue. They were demineralized and cleared. The dye penetration depth was measured in mu m from the beginning of the root canal under the post up to the depth of complete penetration of dye at post. dentin interface under a stereomicroscope at x30. Data were analyzed wit SPSS 20, using one-way ANOVA and post hoc Tukey tests Results: There was significant differences in microleakage between the study groups (One-way ANOVA, P < 0.001). Ascorbic acid with NaOCl showed a significantly less microleakage in mu m (1585 +/- 587.9), followed by distilled water (7777 +/- 4284), EDTA (4900 +/- 1523) and EDTA (3794 +/- 1197) in ascending order. Conclusion: Ascorbic acid with NaOCl for the irrigation of root canal sprepared for post placement showed minimum microleakage.