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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 agreement between right panoramic and lateral cephalometric radiographs
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fig598: The agreement between right panoramic and lateral cephalometric radiographs

Mentions: 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 lower border of the mandible and the distal border of the ascending ramus and the condyle on both panoramic and cephalometric radiographs. Table 1 shows the mean gonial angle measured by the two methods. Table 2, Figures 3 and 4 show the agreement between the two methods (i.e. left and right panoramic and cephalometric radiographs) for measuring the gonial angles by Pearson’s correlation coefficient and Bland-Altman plot. This plot shows the mean of differences between the two measurement methods with a 95% confidence interval. The agreement between the two methods is observed when most of the dots are located in this area. Therefore, Figures 3 and 4 show acceptable agreement between the two methods.


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 agreement between right panoramic and lateral cephalometric radiographs
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig598: The agreement between right panoramic and lateral cephalometric radiographs
Mentions: 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 lower border of the mandible and the distal border of the ascending ramus and the condyle on both panoramic and cephalometric radiographs. Table 1 shows the mean gonial angle measured by the two methods. Table 2, Figures 3 and 4 show the agreement between the two methods (i.e. left and right panoramic and cephalometric radiographs) for measuring the gonial angles by Pearson’s correlation coefficient and Bland-Altman plot. This plot shows the mean of differences between the two measurement methods with a 95% confidence interval. The agreement between the two methods is observed when most of the dots are located in this area. Therefore, Figures 3 and 4 show acceptable agreement between the two methods.

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.