Tomographic analysis of nasal structure modifications following orthognathic surgery
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Published on: May 23, 2020
Bruno Nifossi Prado1, Lucas Cavalieri-Pereira2
1Department of Oral and Maxillofacial Surgery, São Leopoldo Mandic University, Campinas, Brazil. brunoprado8@gmail.com.
Background:
This study aimed to evaluate nasal changes after orthognathic surgery using computed tomography (CT) scans.
Methods:
CT scans of 21 patients who underwent orthognathic surgery were used. These CT scans were performed prior to the surgical procedure (T1) and at least 6 months after orthognathic surgery (T2). The intercanthal distance, alar width of the nose, intercrural distance, right and left nostrils (horizontal and vertical), and the nasolabial angle were measured. Maxillary advancement was measured in millimeters through the anterior nasal spine point of the maxilla.
Results:
The study included 21 patients, with a mean age of 29.3 years (standard deviation [SD], 8.5 years). The mean maxillary advancement was 4.9 mm (SD, 1.2 mm). Significant postoperative increases were observed in alar width (mean difference, 1.1 mm; p= 0.024), the horizontal dimensions of the right and left nostrils (mean differences, 0.5 and 0.6 mm; p= 0.029 and p= 0.034, respectively), and the nasolabial angle (mean difference, 4.9°; p= 0.007). Other measurements showed no significant postoperative differences.
Conclusion:
The nasal structures measured in orthognathic surgeries, distance from the alar base, nasolabial angle, and horizontal dimensions of the right and left nostrils showed statistically significant differences in the postoperative period.
