VI. Abscesses of the Periodontium
A. Gingival abscess
B. Periodontal abscess
C. Pericoronal abscess
VII. Periodontitis Associated With Endodontic Lesions
A. Combined periodontic-endodontic lesions
VIII. Developmental or Acquired Deformities and Conditions
A. Localized tooth-related factors that modify or predispose
to plaque-induced gingival diseases/periodontitis
B. Mucogingival deformities and conditions around teeth
C. Mucogingival deformities and conditions on edentulous
ridges
D. Occlusal trauma