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Supporting Your Practice

When and How to Pre-flare a Root Canal


In this latest instalment in a series of Q&As related to endodontic practice, Dr. John O’Keefe invites Dr. Rodrigo Cunha, endodontist from Winnipeg, to review the principles of pre-flaring a root canal.


Here are some key takeaways from the conversation:

  • Pre-flaring the canal is a procedure that modifies the orifice, thereby allowing instruments easier access to the apical portion. This helps to avoid transportation and file separation.
  • Pre-flaring can be performed in any situation where the instrument is getting stuck in the middle portion of the canal and is having a hard time reaching the apical portion.
  • Pre-flaring is not necessary in every case. In some canals, the anatomy is such that the file can gain access to the apical portion in a smooth way without pre-flaring.
  • Preservation of the dentin is very important. The less tooth structure removed from the peri-cervical dentin zone, the better. Good clinical judgement should be used to decide whether to pre-flare or not.
  • There are numerous systems/instruments on the market for modifying the orifice. Dr. Cunha likes to use nickel titanium instruments and typically uses a rotary system.

We hope you find the conversation useful. We welcome your thoughts, questions and/or suggestions about this post and other topics. Leave a comment in the box below or send us your feedback by email.

Until next time!
CDA Oasis Team

Full Conversation (9'11")

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