Intraoral dental sinus

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Intraoral dental sinus (also termed a parulis and commonly, a gumboil) is an oral lesion characterized by a soft erythematous papule (red spot) that develops on the alveolar process in association with a non-vital tooth and accompanying dental abscess.[1] A parulis is made up of inflamed granulation tissue.

Less commonly, dental infections drain onto the surface of the skin, forming a cutaneous sinus of dental origin.

This condition is often resolved by endodontic treatment and does not have indication for antibiotic use. This is a common mistake among health professionals.[2]


  1. ^ Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). Dermatology: 2-Volume Set. St. Louis: Mosby. ISBN 1-4160-2999-0. 
  2. ^ Delgado, António HS; Codorniz, Maria Carolina; Almiro, Matilde; Pinheiro de Melo, Teresa; Caixinha, Mariana (2016). Why You Should Not Prescribe Antibiotics for Dental Sinus Tracts. Journal of Dental Sciences.