Ulcerative necrotic slough of the gingiva
#Necrotizing_ulcerative_gingivitis
Note: Removal of this film causes bleeding and exposure of ulcerated and erythematous tissue, Is characterized by the acute onset of fetid breath, severe oral pain, blunting of the interdental papilla, and an ulcerative necrotic slough of the gingiva, due to Necrotizing ulcerative gingivitis
Ref:
Uptodate
[ Overview of gingivitis and periodontitis in adults]
Epocrates
[ https://online.epocrates.com/diseases/620/Gingivitis]