Authors : Mitali Bora, Shweta Singh Bijay, Kuldeep Phukon
DOI : 10.18231/j.jco.2019.013
Volume : 3
Issue : 2
Year : 2019
Page No : 15-19
INTRODUCTION: The external gonial angle which plays significant role in the diagnosis of craniofacial disorders is routinely measured from lateral cephalogram and orthopantogram. But how far these radiograph methods are reliable for the measurements of external gonial angle is a question which has been of much interest to investigators.
AIMS AND OBJECTIVES: To compare and discover any difference between the values of gonial angle obtained from the lateral cephalogram and orthopantogram and also between the values of the male and female.To determine the value of external gonial angle in Assamesse population.
MATERIALS AND METHOD: The study was conducted on the lateral cephalogram and orthopantogram of 30 female and 30 male patients having Class-I skeletal malocclusion within the age group of 18-30 years. Each lateral cephalogram and orthopantogram was traced twice and average value of each parameter was taken as the data.
RESULTS: In the study, the mean values of external gonial angle was 120.18 degree in panoramic radiograph and 121.75 degree in lateral cephalogram with no significant difference found in gonial angles obtained from lateral cephalogram and orthopantogram between two genders.
CONCLUSION: The Gonial angle is an important parameter of the craniofacial complex which gives an indication about the vertical parameters and symmetry of the facial skeleton which can be correctly measured by both lateral cephalogram and orthopantogram (OPG)
Keywords: Gonial angle, lateral cephalogram, orthopantogram(OPG), Assamesse population.