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Agreement between panoramic and lateral cephalometric radiographs for measuring the gonial angle.

Zangouei-Booshehri M, Aghili HA, Abasi M, Ezoddini-Ardakani F - Iran J Radiol (2012)

Bottom Line: The gonial angle is one of the most important measurements required for orthodontic treatment and orthognathic surgery.We used Pearson's correlation coefficient and paired t-test for comparison.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) The value of the gonial angle measured on panoramic radiography was the same as that measured on the routinely used cephalometric radiography.

View Article: PubMed Central - PubMed

Affiliation: Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.

ABSTRACT

Background: 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.

No MeSH data available.


The gonial angle in lateral cephalometry
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fig597: The gonial angle in lateral cephalometry

Mentions: The radiographs were viewed and evaluated by two expert radiologists. The gonial angle in the intersection of the ramal plane (Ar-Go) and mandibular plane (Go-Gn) was traced on paper and measured using a protractor with 1 degree accuracy (Figures 1 and 2). The measurements in panoramic and cephalometric radiographs were performed by an expert oral and maxillofacial radiologist. The type of occlusion was determined based on angle classification, the diagnosis recorded in the patient’s medical file and the chronological age. The data were analyzed by SPSS 17 for Windows (SPSS Inc., Chicago, Illinois, USA) using Pearson’s correlation coefficient and paired samples t test.


Agreement between panoramic and lateral cephalometric radiographs for measuring the gonial angle.

Zangouei-Booshehri M, Aghili HA, Abasi M, Ezoddini-Ardakani F - Iran J Radiol (2012)

The gonial angle in lateral cephalometry
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3569548&req=5

fig597: The gonial angle in lateral cephalometry
Mentions: The radiographs were viewed and evaluated by two expert radiologists. The gonial angle in the intersection of the ramal plane (Ar-Go) and mandibular plane (Go-Gn) was traced on paper and measured using a protractor with 1 degree accuracy (Figures 1 and 2). The measurements in panoramic and cephalometric radiographs were performed by an expert oral and maxillofacial radiologist. The type of occlusion was determined based on angle classification, the diagnosis recorded in the patient’s medical file and the chronological age. The data were analyzed by SPSS 17 for Windows (SPSS Inc., Chicago, Illinois, USA) using Pearson’s correlation coefficient and paired samples t test.

Bottom Line: The gonial angle is one of the most important measurements required for orthodontic treatment and orthognathic surgery.We used Pearson's correlation coefficient and paired t-test for comparison.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) The value of the gonial angle measured on panoramic radiography was the same as that measured on the routinely used cephalometric radiography.

View Article: PubMed Central - PubMed

Affiliation: Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.

ABSTRACT

Background: 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.

No MeSH data available.