Surgery for oroantral communication tooth extraction Etiology periapical lesions maxillary cysts surgery Closure of oroantral fistulas/ communication Buccal flap Bony soft tissue Palatal flap defects (Caldwell-Luc procedure 2021/2212021/2/21 Surgery for oroantral communication Buccal flap Palatal flap • tooth extraction • periapical lesions • maxillary cysts surgery Etiology Closure of oroantral fistulas/ communication (Caldwell-Luc procedure) Bony & soft tissue defects