Necrotizing ulcerative gingivitis is a severe, rapidly developing, gingival infection that initially affects the gingival tissues between the teeth. The interproximal gingiva becomes markedly erythematous and ulcerated. Eroded crateriform depressions with a “punched-out” appearance develop at affected sites (Fig. 30). Spontaneous gingival bleeding is commonly observed. The disease can develop around any teeth (i.e., deciduous/permanent, upper/lower, anterior/posterior). It is usually localized to fewer than six teeth, but can gradually spread to adjacent gingival tissues if left untreated. In long-standing cases, deep interproximal craters with destruction of alveolar bone can occur (Fig. 31).
SynonymsVincent’s infection trench mouth acute ulcerative gingivitis Vincent-Plaut infection
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