Is there a Relationship between Vertical Facial Development and Nasal Cavity?

Objectives: The aim of this study was to examine the relationship between vertical direction differences and the nasal cavity in skeletal Class I individuals. Materials and Methods: This study was divided into 2 groups according to the vertical direction angle, and it was conducted on a total of 60 individuals with skeletal Class I features, with 30 individuals in each subgroup. Angular and millimetric measurements (N-ANS, ANS-ME, N-ME, Ba-N/Ptm-Gn degrees, nasal septum, nasal cavity width (NCL), nasal cavity angle degrees (NCA)) were made in accordance with the parameters determined on cone beam computed tomography (CBCT) before the treatment of the individuals constituting the research groups. In a retrospective study, the relationship between vertical skeletal development of the nasal cavity on CBCT images was examined in detail. The Mann-Whitney U test was used, and Student's t test was used to compare two groups with a normal distribution. Spearman's correlation analysis was used to determine the relationship between quantitative data. Results: In the comparison of Class I vertical direction subgroups, a statistically significant difference was found in terms of measurement values ANS-Me and N-Me, nasal cavity width and angular measurements (p<0.001) According to the results of the Mann-Whitney U test, men had significantly higher measurements of the sex and nasal cavity than women (p = 0.001; p<0.001). Conclusion: Class I individuals with different vertical direction dimensions were affected by changes in the nasal cavity during vertical development.