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Chelation in root canal therapy reconsidered.
Journal article

Chelation in root canal therapy reconsidered.

  • Zehnder M Department of Preventive Dentistry, Cariology, and Periodontology, Division of Endodontics, University of Zürich Center for Dental Medicine, Zürich, Switzerland. matthias.zehnder@zzmk.unizh.ch
  • Schmidlin P
  • Sener B
  • Waltimo T
  • 2005-10-27
Published in:
  • Journal of endodontics. - 2005
Anti-Infective Agents, Local
Calcium
Chelating Agents
Chlorine
Citric Acid
Dental Pulp Cavity
Edetic Acid
Enterococcus faecalis
Etidronic Acid
Humans
Microscopy, Electron, Scanning
Organophosphorus Compounds
Polyphosphates
Root Canal Irrigants
Root Canal Therapy
Smear Layer
Sodium Hypochlorite
Spectrophotometry, Atomic
English The aim of this study was to assess interactions of EDTA and citric acid (CA) with sodium hypochlorite (NaOCl), the indispensable endodontic irrigant. Other chelators were simultaneously evaluated as possible alternatives: sodium triphosphate (STP), amino tris methylenephosphonic acid (ATMA), and 1- hydroxyethylidene-1, 1-bisphosphonate (HEBP). Available chlorine was titrated in chelator-NaOCl solutions. All chelators other than HEBP and STP caused an almost complete, immediate loss of available chlorine in solution. Atomic absorbtion spectrometry and SEM evaluation of root canal walls of instrumented teeth indicated that NaOCl had no negative effect on calcium-complexing ability of chelators. STP was too weak a complexing agent to warrant further studies. Finally, CA-, EDTA-, and HEBP-NaOCl mixtures were evaluated for their antimicrobial capacity. Again, EDTA and CA negatively interfered with NaOCl, while HEBP did not.
Language
  • English
Open access status
closed
Identifiers
Persistent URL
https://sonar.ch/global/documents/84996
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