Effect of Sodium Hypochlorite and Sodium Ascorbate on the Shear Bond Strength of Composite to the Dentin of Primary Teeth
Introduction: Endodontic irrigants affect the dentin properties and bond strength to resin materials. The main purpose of this research was to investigate the effect of sodium hypochlorite and sodium ascorbate on shear bond strength of composite to the dentin of primary teeth.
Materials and Methods: For data collection, the observation method and calculation of shear bond strength between composite and dentin surfaces were used. A total of 40 anterior primary teeth with healthy crown and caries free were studied in 4 groups of 10 as a statistical population.
Results: The shear bond strength of resin to the dentin surface of the teeth was calculated and analyzed. The highest shear bond strength was in normal saline group with a mean as much as 31.95 ± 4.90 and the lowest bond strength was in the sodium hypochlorite group with a mean as much as 12.71 ± 3.04. The use of sodium ascorbate after sodium hypochlorite reversed the compromised bond strength (28.76 ± 5.34). Tukey test was used in two groups to compare the shear bond strengths of composite to dentin.
Conclusion: The results showed that the use of sodium hypochlorite (5.25%) reduced the shear bond strength of composite to dentin and the use of 10% ascorbate sodium could compensate for the reduction of bond strength.