Endodontic underfill

This code describes a complication arising from a root canal procedure where the filling material (gutta-percha) does not adequately extend to the full working length of the root canal system. This leaves a void or space at the apex of the tooth, which can lead to persistent infection or treatment failure. It indicates an iatrogenic complication of endodontic treatment.

Use this code when documentation clearly indicates that a previously performed root canal filling is short of the radiographic apex, as confirmed by imaging (e.g., periapical radiographs). This diagnosis is typically made during follow-up examinations or when a patient presents with symptoms related to a failing root canal. The dental record should specify "underfill" or "short fill" in the context of endodontic treatment.

• Do not use this code for initial endodontic treatment where the fill is intentionally short due to anatomical limitations or planned retreatment.
• This code is for a complication of a procedure, not the procedure itself.
• Consider sequencing this code after any codes describing the primary condition necessitating the endodontic treatment, if still present.