How would you apply case-based reasoning to evaluate a patient presenting with persistent periapical radiolucency after root canal therapy?

How would you apply case-based reasoning to evaluate a patient presenting with persistent periapical radiolucency after root canal therapy?

• A. Review the initial diagnosis, re-evaluate for missed canals, check obturation quality, assess restoration integrity, consider systemic factors, and plan retreatment or surgery accordingly.
• B. Ignore persistent radiolucency.
• C. Only order additional radiographs.
• D. Always perform extraction.

Answer: (A)