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BioMed Research International
Volume 2017 (2017), Article ID 1930360, 8 pages
Review Article

Sodium Hypochlorite Irrigation and Its Effect on Bond Strength to Dentin

1Division of Biomaterials, Operative Dentistry Department, King Abdulaziz University, Jeddah, Saudi Arabia
2Biomaterials Department, Faculty of Dentistry, Tanta University, Tanta, Egypt
3Biomaterials and Tissue Engineering Division, Eastman Dental Institute, UCL, 256 Gray’s Inn Road, London WC1X 8LD, UK

Correspondence should be addressed to Ensanya A. Abou Neel

Received 14 May 2017; Revised 28 June 2017; Accepted 12 July 2017; Published 20 August 2017

Academic Editor: Nick Silikas

Copyright © 2017 Tariq S. Abuhaimed and Ensanya A. Abou Neel. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Effective shaping and cleaning of root canals are essential for the success of endodontic treatment. Due to the complex anatomy of root canal spaces, the use of various instrumentation techniques alone is not effective in producing bacteria-free root canal spaces. Irrigation, disinfectants, rinses, and intervisit medications are used in conjunction with the mechanical instrumentation to ensure the success of endodontic treatment. Sodium hypochlorite (NaOCl), a halogenated compound, is routinely used to irrigate the root canal during endodontic treatments. NaOCl has been known for its antibacterial action, proteolytic and dissolution capacity, and debridement properties. NaOCl, however, can alter the composition of dentin and hence its interaction with the adhesive resins used to bond the restorative materials to treated dentin. This review therefore covers in depth the action of NaOCl on dentin-adhesive resin bond strength including both enhancement and reduction, then mechanisms proposed for such action, and finally how the adverse action of NaOCl on dentin can be reversed.