A 22 year old patient, who is otherwise healthy, has severe pain and discomfort in the mouth. Clinical findings are gingival ulceration in the anterior region of both arches, gingiva covered by a yellow-grey slough, ulcerated papillae, gingival bleeding upon slight provocation, a fetid odor but no radiographic evidence of bone loss. What is the most probable diagnosis?
Necrotizing ulcerative gingivitis.
Necrotizing ulcerative periodontitis.
Localized aggressive gingivitis.
Localized aggressive periodontitis.
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