Abstract

Objective: This study was undertaken to determine the total facial angle and subsequently the upper and lower facial angles to demonstrate various growth patterns by cephalometrics and to evaluate the validity of this method as compared with conventional cephalometrics. Materials and methods: Lateral cephalograms of 100 individuals comprising of all males in the age range of 20 to 25 years seeking orthodontic treatment were taken. Lateral cephalograms of these individuals were analyzed by conventional cephalometrics and our new method to assess the growth pattern. Results: The cut-off points of the Total Facial Angle were established as 61.30° ± 3.59° for Horizontal Growth Pattern, 63.8° ± 2.99° for Average Growth Pattern and 66.23° ± 3.02° for Vertical Growth Pattern. Cut-off points for Upper and Lower Facial Angle were also established in all the three growth patterns. In Horizontal Growth Pattern, Upper Facial Angle was as 32.27° ± 1.74° and Lower Facial Angle was 29.00° ± 2.15°. In Average Growth Pattern, Upper Facial Angle was 31.90° ± 1.49° and Lower Facial Angle was 31.90° ± 1.49°. In Vertical Growth Pattern, Upper Facial Angle was 31.83° ± 1.56° and Lower Facial Angle was 34.33° ± 1.42°. Conclusion: From this study we were able to obtain a Total Facial Angle, the measurements of which were able to distinguish Horizontal, Average and Vertical Growth Patterns and proportion of Upper and Lower face was determined in the three growth patterns. In Average Growth Pattern, the Upper and Lower Facial Angle were equal indicating a proportionate face. Whereas, in Horizontal Growth Pattern, Upper Facial Angle was greater than Lower Facial Angle and in Vertical Growth Pattern, Upper Facial Angle was lesser than Lower Facial Angle.

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