INTRODUCTION: The most common cause of cutaneous sinus tracts in the face and neck is chronic dental
infections. Chronic infection around the apex can drain from the mouth through the sinus or, less commonly, through
the skin. Failure to identify the odontogenic cause may result in unnecessary and ineffective treatment. In this
case report , endodontic treatment of mandibular second molar tooth with extraoral sinus tract is to be described.
CASE REPORT: A sixteen-year-old female patient was referred to our clinic after routine dental examination.
The clinic examination showed that sinus tract extraorally in the right mandibular region. In the radiographic
examination, a radiolucent area was observed in the periapical region of tooth number 47. A negative response
was obtained in the electric pulp test of this tooth. Root canal treatment was decided for tooth 47 and calcium
hydroxide dressing was applied 3 times with 3-week intervals. After making sure that there was no pus,
endodontic treatment was completed. For follow-up, the patient was called at 3-month intervals. In the ninth
month follow-up, it was observed that the sinus tract was closed and the inflammatory flow did not reoccur.
CONCLUSION: In this case report, root canal treatment was sufficient for successful healing of the extraoral
sinus tract. A dental etiology should always be considered for cutaneous sinus tract in the head or neck region.
Keywords: Dental Fistula; Endodontics; Root Canal Therapy