Furcation involvement should be suspected when the clinical attachment level on a multi-rooted tooth is at least

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Furcation involvement is suspected when the clinical attachment level on a multi-rooted tooth is at least 5 mm. This is because the furcation is the area where the roots of a tooth meet, and it is a common site for periodontal disease. When the clinical attachment level is at least 5 mm, it means that the periodontal disease has progressed to the point where it is affecting the furcation.

Furcation Involvement Should Be Suspected When the Clinical Attachment Level