Oro-antral fistula

Dr Henry Knipe and Dr Ian Bickle et al.

Oro-antral fistula (OAF) is a pathological communication between the oral cavity and the maxillary sinus (antrum).

There is a slightly greater male predilection 2.

Oro-antral fistulas may be subtyped by location into:

They can result from a number of reasons:

  • following posterior maxillary tooth extraction
  • trauma
  • following radiation therapy
  • osteomyelitis

Typically seen as a disruption or defect involving the bony floor of the maxillary sinus with soft-tissue opacification or fluid involving the ipsilateral sinus. 

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Article information

rID: 25277
System: Head & Neck
Section: Pathology
Tags: stub, refs, cases
Synonyms or Alternate Spellings:
  • Oro-antral fistula (OAF)
  • Oro-antral fistulas
  • Oro-antral fistulation
  • Oroantral fistulation
  • Oroantral fistula
  • Oral-maxillary sinus fistula
  • Oral-maxillary sinus fistulas
  • Oral-maxillary sinus fistulation

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Cases and figures

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    A bony defect thr...
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