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necrotizing periodontal diseases
Necrotizing periodontal diseases are a type of inflammatory periodontal (gum) disease caused by bacteria (notably fusobacteria and spirochaete species). The diseases appear to represent different severities or stages of the same disease process, although this is not completely certain. These diseases usually have a sudden onset, and so the term acute is often added to the diagnosis. The mildest on the spectrum is necrotizing ulcerative gingivitis (NUG), followed by the successively more severe conditions necrotizing ulcerative periodontitis (NUP), necrotizing stomatitis and finally cancrum oris (noma), which is frequently fatal.
==Necrotizing ulcerative gingivitis==
(詳細はmalnutrition. In developing countries, ANUG occurs mostly in malnourished children. Due to shared predisposing factors in a population (e.g. students during a period of examinations, armed forces recruits) ANUG is known to occur in epidemic-type patterns. This has led to the popular belief that ANUG is contagious, but this is not the case. The main features of NUG are painful, bleeding gums and ulceration and necrosis of the interdental papillae (the sections of gum between teeth). There may also be intra-oral halitosis, cervical lymphadenitis (swollen lymph nodes in the neck) and malaise. Treatment of the acute disease is by debridement and antibiotics (usually metronidazole). Poor oral hygiene and other predisposing factors may need to be corrected to prevent recurrence. ANUG is also known as trench mouth, as it was observed to occur in the mouths of front line soldiers during World War I.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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