ABSTRACT
INTRODUCTION: An oroantral fistula is by definition 'An abnormal communication between the oral cavity and the maxillary sinus.' AIM OF THE STUDY: The aim of this study is to describe the acute and chronic OAFs and to evaluate the efficiency of the modified palatal flaps with tissue bridge in the closure of both acute and chronic OAFs of small to medium size. METHODOLOGY: The study sample was derived from a population of patients from January 2013 to 2018 with the complaint of pain and discharge through the socket. RESULT: The results of this series support the view that the use of modified palatal flap with tissue bridge is a reliable flap for the repair of both acute and chronic oroantral fistulae. CONCLUSION: The ease of mobilization, superior blood supply and minimal donor site morbidity make it an ideal flap and a reliable alternative when other techniques fail.