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Related to bifurcation involvement: furcation involvement
bi·fur·ca·tion in·volve·ment(bīfŭr-kāshŭn in-volvmĕnt)
Colloq. for dental caries or periodontal disease extending into the area where the roots of a two-rooted tooth separate or divide; most common on mandibular molars.
Medical Dictionary for the Dental Professions © Farlex 2012