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Importance of anatomic variables in endodontic treatment outcomes: case report.

Surgical endodontic treatment was performed after a large periradicular lesion failed to resolve following nonsurgical intervention. The subsequent periradicular surgery resulted in healing with scar formation. Assessment of the resected root apex revealed a complex anatomy. The ramifications of these anatomical findings and the periradicular tissue response in healing are discussed relative to prognosis and ultimate treatment outcomes.