دوره 9، شماره 4 - ( 9-1403 )
جلد 9 شماره 4 صفحات 270-263 |
برگشت به فهرست نسخه ها
چکیده: (3635 مشاهده)
Background and Aim: This study aimed to assess the accuracy of age estimation by pulp/tooth area ratio (PTR) of maxillary canine teeth on cone-beam computed tomography (CBCT) scans.
Materials and Methods: This descriptive analytical study was conducted on 99 CBCT scans of patients between 18 to 71 years with fully erupted sound maxillary canine teeth. The CBCT scans were evaluated in five sections namely the mid-sagittal section, mid-coronal section, and axial planes [cementoenamel junction (CEJ) section, root section at one-quarter distance from the CEJ, and mid-root section] using OnDemand software. The tooth and pulp surface areas and PTR were calculated. The absolute error of age estimation was calculated by the regression test.
Results: In females, PTR of the CEJ section (-0.338) and one-quarter root section of the axial plane (-0.459; P=0.003 and P=0.000, respectively), and in males, PTR of the mid-root section of the axial plane (-0.346) and mid-sagittal section (-0.455; P=0.013 and P=0.002, respectively ) had significant correlations with age. The mean absolute error of age estimation in the present method, compared with the chronological age of individuals, was 7.227 years. In 39.5% of the cases, the obtained regression formula could estimate age with less than 5 years difference. No significant difference was noted in age estimation for males and females in this method.
Conclusion: It appears that PTR on CBCT images of maxillary canine teeth has a significant correlation with chronological age. The obtained formula in this study could estimate age with acceptable accuracy (less than 7.5 years).
Materials and Methods: This descriptive analytical study was conducted on 99 CBCT scans of patients between 18 to 71 years with fully erupted sound maxillary canine teeth. The CBCT scans were evaluated in five sections namely the mid-sagittal section, mid-coronal section, and axial planes [cementoenamel junction (CEJ) section, root section at one-quarter distance from the CEJ, and mid-root section] using OnDemand software. The tooth and pulp surface areas and PTR were calculated. The absolute error of age estimation was calculated by the regression test.
Results: In females, PTR of the CEJ section (-0.338) and one-quarter root section of the axial plane (-0.459; P=0.003 and P=0.000, respectively), and in males, PTR of the mid-root section of the axial plane (-0.346) and mid-sagittal section (-0.455; P=0.013 and P=0.002, respectively ) had significant correlations with age. The mean absolute error of age estimation in the present method, compared with the chronological age of individuals, was 7.227 years. In 39.5% of the cases, the obtained regression formula could estimate age with less than 5 years difference. No significant difference was noted in age estimation for males and females in this method.
Conclusion: It appears that PTR on CBCT images of maxillary canine teeth has a significant correlation with chronological age. The obtained formula in this study could estimate age with acceptable accuracy (less than 7.5 years).
نوع مطالعه: Original article |
موضوع مقاله:
Radiology
| بازنشر اطلاعات | |
 |
این مقاله تحت شرایط Creative Commons Attribution-NonCommercial 4.0 International License قابل بازنشر است. |