The Effect of Root Canal Irrigation Solution on Flexural Strength of Dentin

Abstract

<p><strong>Objectives: </strong>This study was to investigate the effect of a variety of root canal irrigation solutions on flexural strength of dentin. <strong>Materials and Methods: </strong>Fifty intact, extracted human mandibular third molars were used in this study. Each tooth was sectioned using diamond cutting disc to create dentin bar (1x1 mm, with 7 mm in length). All dentin bars were randomly assigned into 5 groups of 10 each. Group 1, dentin bars were immersed in 5% NaOCl; group 2, in 2.5% NaOCl; group 3, in 15% EDTA; group 4, in 0.2% chlorhexidine gluconate (CHX); and group 5, in saline (as control) respectively. Each group was immeresed for 2 hours. Each dentin bar was subjected to a three-point bend using MTS Universal Testing Machine to test the flexural strength. Data were analyzed using one way Anova, followed by Tukey's test performed at the 0.05 level of significance. <strong>Results: </strong>All irrigation solution have an effect on the flexural strength (P&lt;0.05). EDTA caused the greatest effect on dentin mechanical properties, which revealed the lowest flexural strength (100.64<span>±7.23). In contrast, 0.2% CHX generated the least influence on dentin mechanical properties, which demonstrated the greatest flexural strength (189.85<span>±6.44). <strong>Conclusion: </strong>Root canal irrigation solution can induce effect on flexural strength of detin. Chlorhexidine gluconate demonstrates the best irrigation solution since it has a slight effect on dentinal mechanical properties, particularly flexural strength.</span></span></p><p><span><span>DOI: <span>10.14693/jdi.v16i2.97</span></span></span></p