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KMID : 0361020210640100726
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Korean Journal of Otolaryngology - Head and Neck Surgery
2021 Volume.64 No. 10 p.726 ~ p.733
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Nasal Floor Slanting and Its Association With Nasofacial Structures
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Park Marn-Joon
Choi Yeon-Joo
Shin Chol-Ho
Jang Yong-Ju
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Abstract
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Background and Objectives Nasal floor slanting (NFS) is an incidental radiographic findingof asymmetry in the nasal floor level. Despite its frequent appearance, however, NFS hasnever been properly defined, neither has its correlation with the asymmetry of the adjacentnasofacial structures been investigated. We evaluated the incidence of NFS in patients withsinonasal symptoms and its correlation with the nasofacial skeletal structures.
Subjects and Method We investigated patients who underwent preoperative ostiomeatalunit (OMU) CT and facial photography. We measured the incidence of NFS and its angle in the265 patient images, and analyzed the relationships between NFS and radiologically detectedasymmetries of the adjacent nasofacial skeleton and facial asymmetry visible on a photograph.
Results NFS was found in 51% of the study subjects (136/265), who were defined as theslanted group. The mean NFS angle in the slanted group was 7.7° with a standard deviation(SD) of 4.4°, ranging from 2.4° to 22.4°. The slanted group showed a higher incidence of nasalseptal deviation, asymmetry in the orbit and maxillary sinus, and a larger maxillary cavity (p<0.001) than the non-slanted group. Asymmetry of the face showed a higher incidence in theslanted group (p<0.01), whereas an external nasal deviation did not show an association withNFS.
Conclusion NFS is evident in about 50% of patients complaining of nasal symptoms and isassociated with nasofacial skeletal asymmetry as well as asymmetry in the face.
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KEYWORD
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Facial asymmetry, Nasal floor, Nasal floor level asymmetry, Nasal floor slanting, Nasal septal deviation
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