Access to the maxillary sinus using a bone flap with sinus mucosal and mucoperiosteal pedicles.

We describe a procedure for removing lesions in the maxillary sinus using bone flaps with the sinus mucosa and mucoperiosteum. The surgical design is to construct a rectangular trapdoor using 3 consecutive bur-cuts, fracture the upper margin, and lift the bone lid upward. The osteotomy site on the inferior, medial, and lateral sides of the bone lid was exposed subperiosteally, but the mucoperiosteal and sinus mucosal attachments on the superior and central areas of the lid were maintained.

Procedure of endoscopic removal of a gutta-percha point under the maxillary sinus mucosa by using an ultrathin arthroscope.

We describe here a procedure of endoscopic removal of a gutta-percha point under the maxillary sinus mucosa by using an ultrathin arthroscope. In this study, a 1.2-mm-diameter ultrathin arthroscope was introduced for observation into the maxillary sinus.