Comparative Evaluation of The Efficiency of Panoramic Radiographs and Lateral Cephalograms in The Determination of Right and Left Gonial Angles (original) (raw)
Related papers
Agreement Between Panoramic and Lateral Cephalometric Radiographs for Measuring the Gonial Angle
Iranian Journal of Radiology, 2012
The gonial angle is one of the most important measurements required for orthodontic treatment and orthognathic surgery. It is difficult to determine the accurate measurement of each gonial angle on cephalometric radiographs because of superimposition of the left and right angles. Objectives: The aim of the present study was to determine the right and left gonial angles on panoramic radiographs and to compare them with an evaluated cephalometric sample. Patients and Methods: A total of 80 panoramic and 80 cephalometric radiographs were obtained from 6 to 12-year-old children and the gonial angle was determined by the tangent of the inferior border of the mandible and the most distal aspect of the ascending ramus and the condyleon both panoramic and cephalometric radiographs. We used Pearson's correlation coefficient and paired t-test for comparison. Results: The mean gonial angle was 127.07 ± 6.10 and 127.5 ± 6.67 degrees on panoramic and cephalometric radiographs, respectively. There was no statistically significant difference between the measured gonial angles on panoramic and cephalometric radiographs and also no difference between the right and left (both Ps = 0.18) Conclusion: The value of the gonial angle measured on panoramic radiography was the same as that measured on the routinely used cephalometric radiography. .5812/iranjradiol.8444 Implication for health policy/practice/research/medical education: In case of similar values of gonial angles measured in panoramic and lateral cephalometric radiographs in orthodontic patients planned for optimized treatment, we can use any of these radiographs. Please cite this paper as:
Does the Panoramic Radiography Have the Power to Identify the Gonial Angle in Orthodontics?
The Scientific World Journal, 2012
Purpose. The objective of this study was to assess gonial angle under the angle classification by comparing panoramic radiograph and lateral cephalometric radiograph.Materials and Methods. 49 patients (25 males, 24 females) with an age range of 12–29 years participated in the present study. Subjects were retrospectively selected among those categorised as skeletal and dental Class I, II, and III malocclusion group. Using lateral cephalometric radiograph, mandibular and ramal planes were drawn and based on these planes. Gonial angle was determined from two tangents which were drawn from the inferior border of the mandible and posterior borders of the condyle and ramus of both sides in the panoramic radiographs. Multiple comparison tests (ANOVA) were used to determine differences between the three angle groups.Results. There were no significant differences between Class I, II, and III malocclusion group values of gonial angles determined by lateral cephalometric radiograph and panoram...
Pakistan Orthodontic Journal, 2016
Introduction: Gonial angle is one of the most important values ascertained in lateral cephalogram (lat ceph) tracing. According to the literature, gonial angle can be measured from orthopantomogram (OPG). The objective of this study was to test the reliability of left and right hemispheres of OPG in measuring the gonial angle and to compare these values with lateral ceph measurements. Material and Methods: A hospital based survey was conducted based on patients visiting Orthodontic Department, Peshawar Dental Hospital, Peshawar, from 1 st January 2012 to 31 st March 2015. The radiographs (OPG and lateral ceph) were advised and gonial angle traced to check their accuracy. Results : The sample comprised of 80 patients with class I malocclusion. Mean value of gonial angle measured from lateral ceph was 125.4 + 6.34, from left OPG was 123.8 + 6.17 and from right OPG was 123.2 + 6.38. Conclusions : The gonial angle measured from both sides (left and right) of OPG is equally reliable but ...
Comparison of gonial angle determination from cephalograms and orthopantomogram
Indian journal of dentistry, 2014
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. 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. One-way analysis of variance demonstrated no significant differences between the values of gonial angles determined by lateral cephalogram and p...
International journal of health sciences
Introduction: Growth of the patients occurs in both vertical and horizontal directions. The pattern of the growth can be predicted from both lateral cephalogram and orthopantomogram. GA is one of the important parameter measures from both lateral cephalogram and orthopantomogram which can predict growth direction. In the previous literature GA is measured from LCR and OPG in the vertical facial growth pattern. The objective of this study is to evaluate the reliability of lateral cephalogram compared to orthopantomogram in determining the value of gonial angle in different types of malocclusion groups (Sagittal skeletal class I, II, III). Material and methods: This was a hospital-based study conducted at the Orthodontic Department, Institute of Dentistry LUMHS, Jamshoro/ Hyderabad, Sindh, Pakistan from 19 October 2020 to 12 April 2021. This study recruited 174 participants of 12 years to 30 years of age, 123 female and 51 male patients. Skeletal class I malocclusion patients are 66,...
Taiwanese Journal of Orthodontics
Purpose 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 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 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 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.
Journal of The Pakistan Dental Association, 2018
The aim of this study was to compare three methods of gonial angle determination on a cephalogram with the method used to find gonial angle in an orthopantomogram, amongst three vertical groups (i.e; hyperdivergent, normodivergent and hypodivergent). Methodology: A total of 178 panoramic and cephalometric radiographs of patients ranging from age 12-39 were used in this study. Gonial angle was constructed by three methods defined by Tweed's, Steiner's and Down's on the cephalogram and was then compared to the method of gonial angle determination on an OPG. Repeated measure ANOVA with Bonferroni correction was used for comparison. Results: The mean-difference between the values of different methods of finding Gonial Angle on cephalogram and orthopantomogram of was found to be statistically significant (i.e; P = <0.05) after Bonferroni correction amongst three vertical groups CONCLUSION: The value of gonial angle determination on an Orthopantomogram was found to be different when compared with the three methods (Tweed's, Steiner's and down's) of gonial angle determination on lateral cephalogram.
Journal of Research in Medical and Dental Science, 2020
Introduction: One of the most important measurements required for Orthodontic treatment and Orthognathic surgery is gonial angle. It is difficult to determine the accurate measurement of each gonial angle on cephalometric radiographs because of superimposition of the left and right angles. Objectives: the aim of the present study was to evaluate external gonial angle using orthopantomogram and comparing it with lateral cephalogram in skeletal class I malocclusion. Materials and Methods: From 14 to 29-year adult patients, a total of 100 panoramic and cephalometric radiographs were obtained and the gonial angle was determined by the tangent of the inferior border of the mandible and the most distal aspect of the ascending ramus and the condyleon both panoramic and cephalometric radiographs. To mark and measure the angles and other parameters, cephalometric protractor and calipers were used. Results: The mean gonial angle was 123.30 ± 6.04o and 120.13o ± 5.770 degrees on cephalometric ...
Archives of Dental Research, 2021
Objective: To assess and compare the Gonial angle from Cephalograms and Orthopantograms of patients with Class I and Class II malocclusion. Material and method: A sample of 50 subjects having Class I and Class II malocclusion was selected from patients reporting to Department of Orthodontics and Dentofacial Orthopaedics. The pre-orthodontics treatment lateral cephalogram and orthopantomogram were used to evaluate the Gonial angle for each subject and also to compare the Gonial angle in Class I and Class II malocclusion. Results: In the present study the mean gonial angle by lateral cephalograom was 127±7.39 and by Orthopantomogram it was 123.24 ±7.77 in Class I malocclusion. No statistically significant difference was found mean gonial angle by lateral cephalogram and orthopantomogram. Conclusion: No statistically significant difference was observed between the gonial angle measured using lateral cephalogram and that determined using the panoramic radiographs. Further there no is st...
2021
Introduction: Gonial angle measurements serve as an important parameter of the craniofacial complex and are usually studied on lateral cephalograms, but recently panoramic radiographs have also been used. The aim of this study is to measure the gonial angle using orthopantomogram and lateral cephalogram based on age, gender, ethnicity, and skeletal malocclusion in a tertiary care hospital. Methods: This is a descriptive cross-sectional study comprising 350 selected radiographs of apparently healthy individuals collected for a period of one year, from the Department of Oral Radiology of a tertiary care centre of Nepal. Gonial angle measurements were recorded from digital panoramic radiograph (both right and left side) and lateral cephalogram. Data was collected in terms of age, gender, ethnicity, and skeletal malocclusion and then statistically analysed using the Statistical Package for the Social Sciences version 20. Results: The mean gonial angle for panoramic right, left and later...