Assessment of the relationship between maxillary rotation and nasal morphology in males

Abstract

Background:Nasal features are important in treatment planning for orthodontic treatment.Aims and Objectives:The purpose of the study was to assess the relationship between maxillary inclination and nasal morphology in males.Materials and Methods:Forty-five samples were selected for the study between the age group of 18 and 30 years. Selected individuals were subjected to cephalometric radiography. These lateral cephalograms were traced and divided into three groups on the basis of the angle given by Schwarz for rotation of the maxilla. The nasal features of these groups were evaluated and compared using mean, standard deviation, Student's t-test and analysis of variance.Results:The results suggest that there was statistically significant difference in nasal height, nasal bone length (NBL), nasal depth, nasolabial angle (NLA), nasal tip angle and upper lip inclination angle in different maxillary inclination group.Conclusion:The nasal height, NBL, NLA and nasal tip angle had a maximum value in retro inclination group.

Relationship of Nasal Morphology With Different Dentoskeletal Patterns: A Systematic Review

“…Three studies 28, 29, 34 showed a negative correlation of the angle of inclination (AOI) with nasal length and nasal depth, while 2 studies 28, 34 showed a significant positive correlation of AOI with UNLA, thus suggesting the presence of an upturned nose in an anticlockwise-rotated maxilla. AOI was found to be negatively correlated with NTA by 2 studies, 29, 31 while a positive correlation was seen in 2 other studies. 28, 34…”

“…Two studies 24, 25 included only males in the sample, while 2 studies 23, 26 included only females, out of which one of the studies 26 was conducted on White adolescent females only. One study 31 included only adult males with skeletal class I molar relation on both sides. In 2 studies, 22, 25 only class I and class II samples were analyzed and no class III subject was present.…”

“…Three studies 28, 29, 34 showed an increase in nasal length and nasal depth with clockwise rotation of the maxilla. One study 31 reported an increase in nasal height and decrease in nasal depth with clockwise rotation of the maxilla. Two studies 28, 34 found an upturned nose associated with anticlockwise-rotated maxilla.…”

“…The included studies comprised 15 observational studies, out of which 3 21-23 were longitudinal and the rest 24-35 were cross-sectional in nature. Various authors had tried to relate the nose with different skeletal patterns: some with only sagittal patterns 21, 22, 24-26, 30 (skeletal classes I to III), a few with only vertical patterns 23, 33 (horizontal, vertical grower, low angle, high angle), and a few with both kinds of patterns (sagittal and vertical).…”

“…Three studies 28,29,34 showed a negative correlation of the angle of inclination (AOI) with nasal length and nasal depth, while 2 studies 28,34 showed a significant positive correlation of AOI with UNLA, thus suggesting the presence of an upturned nose in an anticlockwise-rotated maxilla. AOI was found to be negatively correlated with NTA by 2 studies, 29,31 while a positive correlation was seen in 2 other studies. 28,34 The nasal hump did not show any significant correlation with skeletal parameters as per 2 studies, 29,32 while one study 27 showed its low negative correlation with the anteroposterior position of both the jaws and positive correlation with facial heights, inferring that noses with a hump were found with backward and downward facial development rather than with forward facial development (classes I to III) and noses without a hump (straight and concave) were found with forward and upward maxillomandibular facial development rather than with downward facial development.…”