Abstract
Aim
To evaluate the effectiveness of NaOCl, NaOCl-EDTA, and NaOCl+HEBP activated by ultrasonics and XP-endo Finisher on organic tissue removal from simulated internal root resorption cavities.
Methodology
The root canals of 144 single-rooted teeth were instrumented. The teeth were split longitudinally and semicircular cavities were prepared in the canals on each half of the roots. Samples obtained from ground bovine muscle tissue were weighed and adapted into the semicircular cavities. The root fragments were reassembled and cemented to create a circular simulated resorption cavity within the canal. Teeth were divided into twelve groups (n=12) according to the irrigation protocols: Group1: NaOCl, no activation; Group2: NaOCl, Passive ultrasonic irrigation (PUI); Group3: NaOCl, XP-endo Finisher; Group4: NaOCl-EDTA, no activation; Group5: NaOCl-EDTA, PUI; Group6: NaOCl-EDTA, XP-endo Finisher; Group7: NaOCl+HEBP, no activation; Group8: NaOCl+HEBP, PUI; Group9: NaOCl+HEBP, XP-endo Finisher; Group 10: Distilled water, no activation; Group11: Distilled water, PUI; Group 12: Distilled water, XP-endo Finisher. Teeth were disassembled and the tissue samples inside the resorption cavities were weighed. The data was analysed statistically using two-way ANOVA and Fisher's LSD tests with a significance level of 0.05.
Results
The use of XP-endo Finisher with the experimental solutions resulted in the highest tissue weight loss compared to the other activation protocols (p<0.001). There was no significant difference between NaOCl and NaOCl+HEBP in terms of tissue removal.
Conclusion
The use of a NaOCl+HEBP mixture activated with XP-endo Finisher was an effective irrigation regimen for removing simulated organic tissues from artificial internal root resorption cavities in the root canals of single-rooted teeth.
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