define transantral approach
Transantral approach. A transantral approach allows access to the orbital floor via the maxillary sinus. This approach may be especially useful when repairing a floor fracture of the trap door variety. Achieve exposure of the incision site with upper labial retraction exposing the buccal-gingival sulcus. Create a horizontal incision just inferior to the buccal-gingival sulcus so that a wide mucosal band is present.