1. The healthy mouth and normal variants -- 2. Congenital and hereditable disorders with sole or prominent orofacial involvement -- 3. Congenital and hereditable disorders with lesser orofacial involvement -- 4. Acquired disorders affecting the teeth -- 5. Acquired gingival and periodontal disease -- 6. Acquired mucosal disorders -- 7. Acquired salivary gland disorders -- 8. Acquired musculoskeletal disorders -- 9. Pain and neurological disorders -- 10. Orofacial lesions in major medical conditions
