Question

Which of the following statements is incorrect for furcation defect?

• A. Grade 3 defect is clinically visible
• B. Grade 1 can be visible radiographically as radiopaque
• C. In Grade 4 inter-radicular bone is completely lost
• D. In Grade 2 bone is attached to the dome of the furcation

Hint:

Grade 3 furcation defects are not visible clinically and require probing to detect the extent of bone loss.

Answer 1

The Correct Option is A

The statement that is incorrect for a furcation defect is: "Grade 3 defect is clinically visible." In fact, a Grade 3 furcation defect is not clinically visible and can only be detected by using a periodontal probe. 
The other statements are correct: 
- Grade 1 furcation defect can be visible radiographically as radiopaque due to the presence of dense bone in the furcation area. 
- Grade 2 furcation defect is characterized by bone loss up to the dome of the furcation, but some bone is still attached to the furcation. 
- Grade 4 furcation defect is the most severe and is characterized by complete loss of inter-radicular bone.