COMPARATIVE EVALUATION OF THE NASOPHARYNGEAL SOFT TISSUE
CHARACTERISTICS BETWEEN IDEAL OCCLUSION AND CLASS III
MALOCCLUSION IN DAKSHINA KANNADA POPULATION
Introduction :Because of the close relationship between the pharynx and the dentofacial structures, a mutual interaction is expected to occur between the pharyngeal structures and the dentofacial pattern. The aim of this study was to assess and compare the nasopharyngeal characteristics in adults with Ideal occlusion and Class III malocclusion in Dakshina Kannada population. Materials and Methods: The study sample consisted of 64 patients with Class III malocclusion and 96 subjects with Ideal Class I molar relation randomly selected from the patients visiting the department of orthodontics of various dental colleges in Dakshina Kannada district. Lateral cephalograms were manually traced, linear and area measurements were determined to dene the airway characteristics. Independent means t tests and Pearson correlation analysis were used to evaluate sexual dimorphism and the correlations among the variables. Results: Nasal fossa length, lower pharyngeal dimension, and upper adenoid width were greater in the Class III malocclusion group. The cranial base showed signicant correlation with nasal fossa length in the Class III malocclusion group. Lower pharyngeal dimension was increased in Class III malocclusion group compared to Ideal Class I occlusion. Sexual dimorphism was also found within Ideal Class I occlusion and Class III Malocclusion groups. Conclusions : From analysing the data it was found that the nasopharynx in Class III malocclusion patients in Dakshina Kannada was characterised by an increased lower pharyngeal dimension, upper adenoid width, nasal fossa dimension and also smaller cranial base length.