To evaluate effect of three different reducing agents in recovery of bond strength to sodium hypochlorite treated dentin with composite resin

Abstract

Background: Endodontically treated teeth lose a large proportion of their structure due to trauma and caries and during endodontic treatment. As a result, they have low physical properties, fracture resistance, and esthetic appearance. The study aims to evaluate the anti-oxidant efficacy of sodium thiosulphate, citric acid and gallic acid on the recovery of shear bond strength to pulp chamber dentin treated with NaOCI & EDTA. Methodology: 50 single rooted second premolars were divided into 5 groups (n=10); Positive control received no treatment; negative control received only irrigation treatment, while the other two experimental groups were treated with their respective anti-oxidant following the irrigation. All the samples were then cured with composite and subjected to SBS test under a universal testing machine. Statistical analysis: ANOVA & Post hoc tukey were used with P <0.5. Results: Anti-oxidant groups showed a greater mean SBS value than the negative control, comparable to positive control. The sodium thiosulfate group showed the highest value with a significant difference from the negative control group. Conclusion: Both the anti-oxidants used were able to restore the Shear bond strength of pulp chamber dentin altered due to endodontic irrigants. Hence, possesses great potential in its clinical implication.

Evaluation of Chemical Components Changes in Radicular Dentin After Different Final Surface Treatments

“…Its remnants and by-products adversely affect the polymerization of dental adhesive systems (1). Researchers had stated that the bulk of dentin properties could be repaired by more than 60 seconds of application of antioxidant solution before the adhesive procedure, since it can neutralize and reverse oxidizing effect of the NaOCltreated dentin surface (2).This study aimed to evaluate the effect of varying post-space dentin surface treatment methods by using citric acid CA, sodium ascorbate SA solutions and 970 diode laser DL on the energy-dispersive X-ray (EDX) spectroscopy of dentin composition after surface treatments.…”