Glickman classification (Furcation involvement)

Furcations can be:

  • Class I
    • Incipient or early stage of furcation involvement.

  • Class II
    • Cul-de-sac involvement
    • Vertical bone loss may be present

  • Class III
    • Through and through involvement

  • Class IV
    • Through and through with no soft tissue occluding the openings
    • Complete visualization possible
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