During a pulpectomy, what is the main function of an endodontic needle?

The main function of an endodontic needle during a pulpectomy is to deliver irrigation solution down the canal. This step is crucial in endodontic treatment as it helps to cleanse and disinfect the root canal system. Irrigation solutions, typically sodium hypochlorite or other antimicrobial agents, are employed to eliminate debris, bacteria, and necrotic tissues from the canal, facilitating a more effective cleaning and shaping process. This ensures a thorough preparation of the canal before filling, which is essential for successful treatment and prevention of future infection.

Other procedures in a pulpectomy, such as removing the tooth, creating access to the pulp, or filling the canal, serve different purposes and do not directly involve the specific action of delivering the irrigant, which is why the focus on the endodontic needle lies in its role in irrigation.