EXPLORING THE RELIABILITY AND ACCURACY OF GONIAL ANGLE BEYOND TRADITIONAL METHODS
Author(s): Mayma Nathasha M*, Madumitha Nandha, Yuvapriya P, Jeyameera RR and Sukanya R
Abstract
Objective: The objective of the study is to assess the accuracy and reliability of gonial angle measurement using lateral cephalogram and CBCT of adult patients with skeletal class I malocclusion. Materials and methods: A retrospective study was conducted in patients with skeletal class I malocclusion using lateral cephalogram and CBCT images of mandible. One way ANOVA was used to find the mean difference of gonial angle between the cephalogram, left side CBCT and right side CBCT. Paired t test was used to find the mean difference of gonial angle between cephalogram and CBCT values. Independent sample t test was used to find the mean difference of gonial angle between the left and right side CBCT. Results: No statistically significant difference was found between the gonial angle measured using cephalogram and CBCT, on comparing the gonial angle measured by cephalogram and CBCT left side and on comparing the gonial angle measured by CBCT right and left sides. A statistically significant difference was found on comparing the gonial angle measured by cephalogram and CBCT right side (p value 0.041). Conclusion: Both lateral cephalogram and CBCT imaging techniques are similar in assessing the gonial angle in class I malocclusions. In cases where there are other indications for CBCT imaging, the gonial angle can be measured from it, without necessitating additional radiographs.