[Management of several special periodontal problems].
Ling
L J
LJ
D005892:Gingivitis, Necrotizing Ulcerative / Q000628:therapy*; D006801:Humans; D010509:Periodontal Cyst / Q000628:therapy*; D010510:Periodontal Diseases / Q000628:therapy; D014092:Tooth Root / Q000473:pathology*