Parulis or Gumboil

A parulis (gumboil) below the mucogingival line of the lower right first molar indicates where a fistula from a periapical abscess is draining into the oral cavity. Such fistulas take the path of least resistance; therefore, the parulis generally forms through the alveolar mucosa or at the level of the mucogingival line where the attached gingiva begins. A dental radiograph should be made to identify the source of the draining fistula. This radiograph shows the periapical lucency typical of a chronic periapical abscess.

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