Dental Post-treatment apical periodontitis in an endodontically treated tooth is called as: A Recurrent apical periodontitis. B Persistent apical periodontitis. C Phoenix abscess. D Chronic periapical abscess. 💡 Explanation Post-treatment apical periodontitis in an endodontically treated tooth is called as: ✓ Correct Answer: B. Persistent apical periodontitis.