Severity of Mandibular Arch Crowding Among Different Growth Patterns in Class li Malocclusion.

Crowding of teeth is one of the most common malocclusion. Determination of etiology of crowding could have significant effects on treatment planning and prognosis of class II malocclusion. Growth pattern might affect the amount of crowding in class II malocclusion. Aim of this study was to evaluate the relationship between lower dental arch crowding and various growth patterns in class II subjects. Pretreatment lateral cephalograms and dental occlusal view mandibular arch photographs for class II subjects were collected for the study. Lateral cephalograms were traced and the subjects were divided into different growth patterns (n=60) (horizontal =20, vertical = 20, average = 20) on the basis of gonial angle. Crowding in each growth pattern was assessed from the records of patients visiting the dental hospital. From the results,15% of the vertical growers showed very severe crowding, 20% of the vertical growers showed severe crowding, 40% showed moderate crowding, 5% had mild crowding. 10 % of the horizontal growers showed severe crowding, 25% had moderate crowding, 40% showed mild crowding. 35 % of the average growers had moderate crowding, 30% had mild crowding. Results were statistically significant.(p<0.05). Significant association was found between vertical growth patterns and severity of the mandibular arch crowding as compared to horizontal or average growth patterns. No association between crowding and gender. Hence, it can be concluded that the Class II subjects with Vertical growth patterns have severe lower dental arch crowding as compared to the subjects with horizontal and average growth patterns. [ABSTRACT FROM AUTHOR]