en Radiology Radiology Original article Original article <div style="text-align: justify;"><span style="font-size:13pt"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:9.0pt"><span style="font-family:" verdana=""><span style="color:#2e74b5">Background and Aim</span></span></span></b><b><span style="font-size:9.0pt"><span style="font-family:" verdana=""><span style="color:#2e74b5">:</span></span></span></b> <span style="font-size:9.0pt"><span style="font-family:" verdana="">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.</span></span></span></span><br> <span style="font-size:13pt"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:9.0pt"><span style="font-family:" verdana=""><span style="color:#2e74b5">Materials and Methods: </span></span></span></b><span style="font-size:9.0pt"><span style="font-family:" verdana="">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.</span></span>&nbsp;</span></span><br> <span style="font-size:13pt"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:9.0pt"><span style="font-family:" verdana=""><span style="color:#2e74b5">Results: </span></span></span></b><span style="font-size:9.0pt"><span style="font-family:" verdana="">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&nbsp; 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.</span></span><span style="font-size:9.0pt"><span style="font-family:"Verdana",sans-serif"></span></span></span></span><br> <b><span style="font-size:9.0pt"><span style="font-family:" verdana=""><span style="color:#2e74b5">Conclusion:</span></span></span></b> <span style="font-size:9.0pt"><span style="font-family:" verdana="">It appears that PTR on CBCT images of maxillary canine teeth has a significant correlation with chronological age.&nbsp; The obtained formula in this study could estimate age with acceptable accuracy (less than 7.5 years). </span></span></div> Age Determination by Teeth, Cone-Beam Computed Tomography, Cuspid, Dental Pulp, Dental Records, Forensic Dentistry 263 270 http://jrdms.dentaliau.ac.ir/browse.php?a_code=A-10-1412-1&slc_lang=en&sid=1 Shirin Sakhdari sh.sakhdari@yahoo.com 100319475328460013372 100319475328460013372 No Oral and Maxillofacial Radiology Department, Faculty of Dentistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran Mahmoud Ghasemi mahiran99@yahoo.com 100319475328460013373 100319475328460013373 No Periodontology Department, Faculty of Dentistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran Sahel Shahrestani sahelshahrestani7@gmail.com 100319475328460013374 100319475328460013374 Yes Periodontology Department, Faculty of Dentistry, Shahed University, Tehran, Iran