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Year : 2014  |  Volume : 5  |  Issue : 3  |  Page : 123-126

Comparison of gonial angle determination from cephalograms and orthopantomogram

1 Department of Orthodontics and Dentofacial Orthopedics, Luxmi Bai Institute of Dental Sciences and Hospital, Patiala, Punjab, India
2 Department of Conservative Dentistry and Endodontics, HSJ Institute of Dental Sciences and Hospital, Panjab University, Chandigarh, India
3 Department of Pedodontics and Preventive Dentistry, Swami Devi Dayal Hospital and Dental College, Barwala, Panchkula, Haryana, India
4 Private Practice, New Delhi, India

Correspondence Address:
Mandeep Kaur Bhullar
H. No. 3275, Sargodha Housing Society, Sector 50 D, Chandigarh
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0975-962X.140820

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Introduction: Gonial angle is an important parameter of the craniofacial complex giving an indication about the vertical parameters and symmetry of the facial skeleton. Both orthopantomogram (OPG) and lateral cephalograms can be used for the measurement of gonial angle. Because of the superimpositions seen on lateral cephalograms, reliable measurement of the gonial angle becomes difficult. The aim of the present study is to check the possible application and reliability of OPG for gonial angle determination by clarifying whether there is any significant difference between the determination of gonial angle from OPG and cephalogram. Materials and Methods: Gonial angle measurements were made on lateral cephalograms and orthopantomograms of 98 patients - 44 males (mean age 25.9 years) and 54 females (mean age 21.3 years), and compared using Statistical Package for Social Sciences. Results: One-way analysis of variance demonstrated no significant differences between the values of gonial angles determined by lateral cephalogram and panoramic radiography. Pearson correlation showed a high correlation between cephalometric and OPG gonial angle value. Conclusion: Panoramic radiography can be used to determine the gonial angle as accurately as a lateral cephalogram. For determination of the gonial angle, an OPG may be a better choice than a lateral cephalogram as there are no interferences due to superimposed images of anatomical structures as in a lateral cephalogram. Thus, the present study substantiates the possibility of enhancing the clinical versatility of the panoramic radiograph, which is an indispensable tool for dental diagnosis.

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