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Non surgical re-treatment with rnt files
Non surgical re-treatment with rnt files
Non surgical re-treatment with rnt files
Non surgical re-treatment with rnt files
Non surgical re-treatment with rnt files
Non surgical re-treatment with rnt files
Non surgical re-treatment with rnt files
Non surgical re-treatment with rnt files
Non surgical re-treatment with rnt files
Non surgical re-treatment with rnt files
Non surgical re-treatment with rnt files
Non surgical re-treatment with rnt files
Non surgical re-treatment with rnt files
Non surgical re-treatment with rnt files
Non surgical re-treatment with rnt files
Non surgical re-treatment with rnt files
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Non surgical re-treatment with rnt files

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  • 1. Non-Surgical Re-treatment with RNT Files
    AlaaWaleedAlQutub
    Umm AlQura University , Faculty of Dentistry
  • 2. Aetiology of root canal treatment failure
    Microbial Non-microbial
    failure
    Intraradicular infection
    Extraradicular infection
    Foreign body reaction
    Periradicular cyst
  • 3. Non-surgical Re-treatment
    Hand instruments Ultrasonics
    (Hedstrom files+
    chloroform)
    RNT files
    • R-Endo(Micro-Mega)
    • 5. NiTi files : Efficiency, flexibility
    • 6. respect of the canal anatomy
    • 7. safety and short procedural time
    • 8. allow apical irrigation to aid the disinfection of the apical zone and ideal preparation of the canal for three-dimensional filling.
    Rm
    Re
    R1
    R2
    R3
    Rs
  • 9. Micro head
  • 10.
  • 11.
    • ProTaper(Dentsply)
    • 12. Nickel-Titanium :Extreme flexibility
    • 13. Unique multi-taper shape : effective cleaning &
    obturation, Minimizes file stress
    • Triangular cross-section, reducing
    dentine-instrument contact
    • New, non-cutting guiding tip
    • 14. 13mm short handles : Easier access to posterior teeth
  • 15. Review of Some Researches
  • 16. Effectiveness of two NiTi rotary instruments and a hand file for removing gutta-percha in severely curved root canals during retreatment an ex vivo study
    Aim:
    To evaluate the effectiveness of hand files, proTaper & R-Endo rotary instruments in removing GP from curved canals
    Methodology .
  • 17.
    • Results :
    • 18. No significant Differences between the method of removal
    • 19. The apical third had the most remaining GP
    • 20. none of the instruments fractured
    Conclusion:
    All instruments even ProTaper & R-Endo RNT files were inadequate for removal of filling material from root canal system
  • 21. Efficacy of automated versus hand instrumentation during root canal retreatment
    Aim.
    Methodology
    Group A Group B
    • GG and K-files , Profiles, ProTaper, K3 , MicroMega Hero 642.
    • 22. Assessed radiographically.
    • 23. Split for evaluation in a stereomicroscope.
    • 24. photomicrograph for further analysis .
    100 single rooted teeth
    Endofill + GP
    Sealer 26 + GP
  • 25. Conclusion :
    A photomicrographic method was more effective than the radiographic method to evaluate filling debris.
    There was no significant difference between the filling materials in terms of their removal.
    K3 and ProTaper were more efficient than manual instrumentation.
  • 26. Results:
    Significant differences between radiograph and photomicrographic evaluation methods.
    No significant differences in removal between filling materials
    Manual instrumentation left more debris on the canal walls compared to PtoTaper.
  • 27. Final Conclusion
  • 28. References
    Siqueira JF, Jr. Aetiology of root canal treatment failure : why well treated teeth can fail (Literature review ). International Endodontic Journal ,34 ,1-10,2001
    R.Gergi & C. Sabbagh (2007).Effectiveness of two NiTi rotary instruments and a hand file for removing gutta-percha in severely curved root canals during retreatment an ex vivo study. International Endodontic Journal, 40,532-537.
    A. C. de CarvalhoMaciel, M. F. ZaccaroScelza (2006) .Efficacy of automated versus hand instrumentation during root canal retreatment: an ex vivo study. International Endodontic Journal 39 (10), 779–784.

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