en orthodontic orthodontic Original article Original article <div> <table align="center" hspace="0" vspace="0"> <tbody> <tr> <td style="padding: 0cm 12px; text-align: justify;" valign="top"><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><b> </b><span style="font-size:9.0pt"><span style="font-family:" verdana="">The most valid method for radiographic estimation of dental age is the Demirjian method. However, the use of Demirjian indices has shown variations among different races worldwide. Therefore, the aim of this study was to investigate the relationship between the chronological age and dental age of 6-15-year-old children in Zanjan, Iran by using the Demirjian method. &nbsp;</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="">In this descriptive correlational study, 250 panoramic radiographs of children aged 6 to 15 years in Zanjan, Iran were used. The dental age was calculated from the radiographic images based on the calcification stage of all left mandibular teeth according to the Demirjian method. The chronological age and demographic data were collected based on patient records. The relationship between the chronological age and dental age was analyzed by the Spearman correlation coefficient and Wilcoxon test.</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">Results:</span></span></span></b> <span style="font-size:9.0pt"><span style="font-family:" verdana="">There was a strong positive correlation between the chronological age and dental age of all participants (r=0.93).<br> Comparing the mean chronological age and dental age of the participants showed a significant difference between the two values (P<0.001).</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">Conclusion:</span></span></span></b> <span style="font-size:9.0pt"><span style="font-family:" verdana="">Based on the results of the present study, it may be concluded that despite significant statistical differences, the Demirjian method has sufficient clinical accuracy for dental age estimation in 6&ndash;15-year-olds in Zanjan, Iran. </span></span></span></span></td> </tr> </tbody> </table> </div> <div style="text-align: justify;"></div> Age Determination by Teeth, Child, Iran, Radiography, Panoramic, Tooth Calcification 243 248 http://jrdms.dentaliau.ac.ir/browse.php?a_code=A-10-1197-1&slc_lang=en&sid=1 Aisan Nouri Eyesun.noori@gmail.com 100319475328460011467 0000000342812405 No Dental Biomaterials Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran Mostafa Sheikhi mostafasheikhi9045@gmail.com 100319475328460011468 0000000263898191 Yes Department of Orthodontics, School of Dentistry, Zanjan University of Medical Sciences, Zanjan, Iran Seyed Kian Haji Seyed Javadi Kian.javadi.dentist@gmail.com 100319475328460011469 0000000187331686 No Community Oral Health Department, School of Dentistry, Shahid Beheshti University of Medical Sciences, Teh-ran, Iran