抄録
Three kinds of lateral nasal window in Caldwell-Luc operation were observed fiberscopically for 3 years after surgery in 3 7 patients with chronic maxillary sinusitis with ethrr oiditis and postoperative maxillary cyst.
When the lateral nasal mucosa was removed, the window narrowed circumferentially. The anterior and inferior edge of the window showed marked extension postero-superiorly, leaving a small round opening in the postero-superior part of the lateral nasal wall 8-12 months after surgery.
When a Boenninghaus flap was laid on the maxillary floor, narrowing of the window was minimum and the contour of the window was well maintained for more than 2 years after surgery. This was also true when two flaps were made, one of which was based superiorly and the other was based inferiorly. However, the window became half blocked from the sinus side because of rapid formation of granulation, resulting in a crescent-shaped opening in the postero-superior part of the lateral nasal wall.
