Abstract:
Background: Oroantral fistula (OAF) is a pathological communication between the oral cavity and maxillary sinus.
This abnormal connection may be the result of a number of pathologic factors and often occurs following an extraction
of posterior maxillary teeth due to the close anatomical relationship between the teeth and the sinus floor.
Objective: A rare case with maxillary sinusitis and advanced periodontitis that created oroantral fistula and its
treatment with pedicled buccal fat pat was presented.
Case Description: Clinical and radiological examination of the 46-year-old male revealed OAF and Class II furcation
involvement related with the tooth #17. The tooth was extracted and the buccal fat pad was stitched to the adjacent
mucosa. Postoperative course was uneventful and the patient underwent periodontal therapy.
Practical implications: The maxillary sinus infection and/or periodontal destruction are rare causes of OAF. If these
diseases are neglected or advanced, may lead to irreversible fistulas.
