부산대학교 도서관

We analyzed the CT data of 327 cases (except for cases with face injury) that underwent surgery for deviation of the nasal septum between April 2014 and March 2019 at our hospital, and examined the association between caudal-end deviation of the nasal septum and transformation of the premaxillary wing. We calculated the ratio of the area of the narrower nasal cavity to that of the wider nasal cavity at the entrance of the nostril (the N/W ratio), and classified the degree of caudal deviation as follows: mild, N/W ratio 0.8-0.6; moderate, N/W ratio 0.6-0.4; severe, N/W ratio less than 0.4. Also, we classified the transformations of the premaxillary wing into three patterns, as follows: vertical type, cases in which the vertical axis did not incline; tilting type, cases in which the vertical axis inclines; bony-spine type, in which there is transformation with a bony spine. Cases with transformation of the premaxillary wing accounted for 20.9% of all the cases without deviation of the septum at the caudal end, 52.2% of all cases with mild deviation of the caudal end of the septum, 83.3% of all cases with moderate deviation of the caudal end of the septum, and 100% of all cases with severe deviation of the caudal end of the septum. Thus, as the severity of deviation of the caudal end of the septum increased, the percentage of cases with a transformed-type premaxillary wing (especially, the tilting type) also increased. The bony-spine type was recognized in cases with moderate deviation (23.3%) or severe deviation (24.0%) of the caudal end of the septum.