What is the furcation involvement score noted in the periodontal assessment?

• A. 0
• B. 1
• C. 2
• D. 3

Answer: (C)

In periodontal charting for multi-rooted teeth, the furcation involvement score describes how far bone loss has reached the area where roots divide. A score of 2 indicates a through-and-through furcation involvement, meaning horizontal bone loss has extended across the furcation so a periodontal probe can pass from one side of the furcation to the other. This reflects more advanced involvement than a simple entrance into the furcation (which would be a lower score) but not necessarily the most extreme case where the furcation is clinically exposed due to recession (which would be a higher score). This level of involvement signals a significant cleaning and treatment challenge and affects prognosis and planning.