Journal of AdvancedMedical and Dental Sciences Research

Introduction: Sodium hypochlorite-NaOCl antimicrobial effectiveness, such as passive ultrasonic irrigation as a supplementary disinfecting step and using NaOCl with a higher concentration, volume or temperature may increase its effectiveness. To evaluate the postoperative pain at various temperatures of the sodium hypochlorite irrigation. Material and Methodology: Ninety subjects were selected and made to three groups who were treated with NaOCl 2ºC, NaOCl 25ºC, NaOCl 45ºC irrigant. The root canal treatments were completed and the participants were given instructions to record postoperative pain levels at 24, 48 and 72 hours, 5 days and 1 week after treatment using a visual analog scale (VAS). Bacterial loads were studied before- S1and after the therapy - S2. Results: The reduction in the number of total bacterial cell equivalents from S1 to S2 was statistically significant in all groups (p<0.001). The NaOCl 2˚C group reported significantly less postoperative pain than the NaOCl 45˚C group (p<0.05). Postoperative analgesic intake was significantly higher in the NaOCl 45˚C group than in the NaOCl 2˚C group (p<0.05). Conclusion: It can be concluded that final irrigation with NaOCl at different temperatures results in similar antibacterial effectiveness. Final irrigation with cold NaOCl (2˚C) is better than NaOCl 45˚C when comparing postoperative pain levels.