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ROOT CANAL IRRIGANTS

  • An important objective in endodontic therapy is the removal of pulpal and dentinal debris from the root canal system, to accomplish this it is essential to use an irrigant or combination of irrigants during and after biomechanical preparation of the canal system. Refers to as chemical preparation, when accomplished simultaneously are often reported as “chemomechanical preparation”.
  • ACIDS AND CHELATING AGENTS
  • Acids and chelating agents were used because of their ability to soften dentin, making enlargement of the canal system easier. Acids such as 30% hydrochloric acid and 50% phosphoric acid were used as late as 1940s with little or no understanding of effects on periradicular tissues.
  • These caustic acids dissolved inorganic structure of dentin with the remaining organic matrix offering less resistance to instrumentation.

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