Abstract
Osteoplastic maxillary antrostomy is performed to restore the normal anatomy and physiology of the maxillary sinus. Although endoscopic sinus surgery has been employed since the 1980s, antrostomy through the canine fossa is still required in cases such as an inverted papilloma originating from the maxillary sinus or a blow-out fracture of the inferior orbital floor. Herein, we demonstrate a new procedure using a collagen sponge (Terudermis®, Olympus Terumo Biomaterials Co., Ltd., Tokyo, Japan) to support the free bone flap of the anterior wall of the maxillary sinus. The collagen sponge also promotes epithelialization of the maxillary sinus. We employed this procedure in 11 cases, including five cases involving repair of a blow-out fracture of the inferior orbital floor, two to remove fungal growth from the maxillary sinus, three to remove an inverted papilloma of the maxillary sinus, and one for removal of an odontogenic maxillary cyst. In all cases, the maxillary sinus was epithelialized without infection, except for one recurrent case of papilloma. In seven of the 11 cases, postoperative CT was performed, showing that the bony flap was maintained in the original position. This new method simplifies osteoplastic maxillary surgery and reduces the surgical time.
