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VOLUME 13 , ISSUE 1 ( January-February, 2012 ) > List of Articles

ORIGINAL RESEARCH

Effect of Smear Layer on the Apical Seal of Endodontically Treated Teeth: An ex vivo Study

KG Nischith, GPV Srikumar, Shuaib Razvi, R Vinay Chandra

Citation Information : Nischith K, Srikumar G, Razvi S, Chandra RV. Effect of Smear Layer on the Apical Seal of Endodontically Treated Teeth: An ex vivo Study. J Contemp Dent Pract 2012; 13 (1):23-26.

DOI: 10.5005/jp-journals-10024-1090

Published Online: 01-02-2012

Copyright Statement:  Copyright © 2012; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Aim

The purpose of this study was to evaluate the effect of smear layer on apical seal of endodontically treated teeth.

Materials and methods

Sixty freshly extracted human maxillary central incisor teeth were selected and were randomly divided into two experimental groups. Group A of 25 teeth and group B of 25 teeth and a control group of 10 teeth. Cleaning and shaping of the root canals were performed using endodontic K-files up to no. 50 size file in step-back technique. During the process, in root canals of group A, 17% EDTA (ethylenediaminetetraacetic acid) followed by 3% NaOCl (sodium hypochlorite) was used as root canal irrigant.

In group B, MTAD (mixture tetracycline citric acid and detergent) was used as a root canal irrigant.

In control group, saline was used as root canal irrigant. The root surfaces were then coated with nail polish of both experimental groups and control group. The samples were then immersed in India ink dye for 1 week at 37°C.

Results

The statistical analysis of the results showed that the apical leakage was significantly more in teeth, where smear layer was not removed.

Conclusion

The removal of smear layer improves the longterm apical seal and success of endodontically treated teeth.

Clinical significance

The development and maintenance of apical seal is desirable and considered to be a major prerequisite to improve the outcome of root canal treatment.

How to cite this article

Nischith KG, Srikumar GPV, Razvi S, Chandra RV. Effect of Smear Layer on the Apical Seal of Endodontically Treated Teeth: An ex vivo Study. J Contemp Dent Pract 2012;13(1):23-26.


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  1. Textbook of Endodontics (5th ed). Chapter 10: Endodontic cavity preparation: 503-05.
  2. Hermetic sealing of root canals, value in successful endodontics. J Dent Radiogr Photogr 1964;37:85-90.
  3. An ex vivo evaluation of a new root canal irrigation technique with intracanal aspiration. Int Endod J 2006;39:93-99.
  4. Endodontic Practice. Philadelphia, Lea and Febiger 1981;10:279.
  5. Dentin permeability: Effects of smear layer removal. J Prosthet Dent 1981;46:531-37.
  6. In vitro infection and disinfection of dentinal tubules. J Dent Res 1987;66:1375-79.
  7. Acid treatment of cavities under resin fillings: Bacterial growth in dentinal tubules and pulpal reactions. J Dent Res 1973;52:1189-93.
  8. Smear layer removal effects on apical leakage. J Endod 1995;12:21-27.
  9. Evaluation of the apical seal produced by injected thermoplasticized gutta percha in the absence of smear layer and root canal sealer. J Endod 1986;12:101-07.
  10. Scanning electron microscopic investigation of the smear layer on the root canal walls. J Endod 1984;7-10:477-83.
  11. Contemporary endodontic retreatments: An analysis based on clinical treatment findings. J Endodon 2002;28:834-36.
  12. Adhesion of sealer cements to dentin with and without the smear layer. J Endod 1991;17:15-20.
  13. The effect of smear layer on apical seal of endodontically treated teeth. Journal of Research in Medical Sciences 2004;3:130-33.
  14. A scanning electron microscopic comparison of a high volume final flush with several irrigating solutions. J Endod 1983;2(9):137-42.
  15. Scanning electron microscopy study of the adhesion of prevotella nigrescens to the dentin of prepared root canals. J Endod 2002;6:433-37.
  16. The effect of various concentrations of sodium hypochlorite on the ability of MTAD to remove the smear layer. J Endod 2003:29(4):233-40.
  17. Surface tension of root canal irrigants. J Endod 2000;26(10):586-87.
  18. The effects of decreasing surface tension on the flow of irrigating solutions in narrow root canals. Oral Surgery 1982;4(5):524-26.
  19. Evaluation of the apical leakeage by fluid filtration method following obturation. An invitro study. J Endod 1996;14:21-27.
  20. Lack of correlation among three methods for evaluation of apical leakage. J Endod 2001;5:347-50.
  21. Endodontic infection: Some biologic and treatment factors associated with outcome. Oral Surg Oral Med Oral Pathol Oral Radio and Endod 2003;96:81-90.
  22. Factors affecting the long-term results of endodontic treatment. J Endodon 1990;16:498-504.
  23. The effect of QMix, an experimental antibacterial root canal irrigant, on removal of canal wall smear layers and debris. J Endod 2011;37:80-84.
  24. Microporous, demineralized collagen matrices in intact radicular dentin created by commonly used calcium-depleting endodontic irrigants. J Endod 2007;33:1086-90.
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