Purpose: To investigate whether panoramic radiograph can be used as an alternative to lateral cephalogram for measuring the gonial angle in skeletal Class I patients. Patients and Methods: Panoramic radiograph and lateral cephalogram were collected from the pretreatment records of 100 patients of the age 16-30 years from the Department of Orthodontics. Radiographs were manually traced and the gonial angle was measured. Paired t-test was used to find the difference in mean gonial angle between the panoramic radiograph and lateral cephalogram. A simple regression analysis was performed to find the relationship between the gonial angles in two different radiographs. Results: The mean gonial angle in lateral cephalogram was greater in panoramic radiograph, which was statistically significant (P < 0.05). The mean gonial angle in female was found to be greater than the male patients in all radiographs. No significant difference was found between the mean gonial angle in lateral cephalogram and right panoramic radiograph. Linear regression analysis showed that, with a one-degree change in mean gonial angle in lateral cephalogram, the mean gonial angle in panoramic radiograph increases by 0.804. Conclusion: Right sided panoramic view can be used to determine the gonial angle as accurately as lateral cephalogram in Nepali sample. Regression equation was derived to find the relationship of gonial angle between panoramic radiograph and lateral cephalogram.
Rajak, Ravi Ranjan Kumar; Shrestha, Rabindra Man; and Koju, Sushmit
"Reliability of Panoramic Radiography in Assessing Gonial Angle Compared to Lateral Cephalogram in Patients with Class I Malocclusion,"
Taiwanese Journal of Orthodontics: Vol. 33
, Article 2.
Available at: https://www.tjo.org.tw/tjo/vol33/iss2/2
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