Dental Which of the following is most useful in differentiating an acute periodontal abscess from periapical abscess? A Type of exudates B Nature of swelling C Intensity of pain D Result of periodontal probing 💡 Explanation Which of the following is most useful in differentiating an acute periodontal abscess from periapical abscess? ✓ Correct Answer: D. Result of periodontal probing