Department of Pediatric Dentistry, Faculty of Dentistry, Inonu University.
Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Inonu University, Malatya, Turkey.
J Craniofac Surg. 2021;32(5):1826-1829. doi: 10.1097/SCS.0000000000007516.
The aims of this study were to compare the radiographic development of permanent teeth in a group of children with and without supernumerary teeth (ST), determine whether using cone-beam computed tomography or panoramic radiography improves the accuracy of dental age (DA) estimation and investigate the effects of factors including the numbers and positions of ST.
One hundred fifty dental radiographs of children with and without ST at the ages of 6.0 to 14.9 years were included in this study. The children in both groups were age and sex-matched. The lower left-side 7 permanent teeth were evaluated according to the Demirjian method, DA was determined. The difference between chronological age (CA) and DA (CA-DA) for the children with and without ST and further based on the number and localization of ST were calculated.
For all groups, the mean DA values were higher than the mean CA values. The difference between the CA and DA values in the children with ST was higher than the difference in the children without ST. Supernumerary teeth in posterior localization, multiple ST and among boys were observed to increase the differences between the mean CA and DA values. The mean age difference between radiographies in the children with and without ST was similar.
Panoramic radiography was found adequate in determination of dental development with the Demirjian method. Dental development was even more advanced in the children with ST in comparison to the control group. Clinicians should keep in mind that the dental developments of children with supernumerary teeth may be advanced.
本研究旨在比较有和无额外牙（ST）儿童群体的恒牙放射影像学发育情况，确定使用锥形束 CT 或全景片是否能提高牙龄（DA）评估的准确性，并研究包括 ST 数量和位置在内的多种因素的影响。
本研究纳入了 150 名年龄在 6.0 至 14.9 岁、有和无 ST 的儿童的牙科 X 光片。两组儿童在年龄和性别上均匹配。根据 Demirjian 法评估左下颌侧 7 颗恒牙，确定 DA。计算有和无 ST 儿童的 CA-DA 差异，并进一步根据 ST 的数量和位置进行计算。
所有组的平均 DA 值均高于平均 CA 值。有 ST 儿童的 CA 和 DA 值之间的差异高于无 ST 儿童的差异。后牙区 ST、多发 ST 和男孩中观察到 ST 会增加 CA 和 DA 均值之间的差异。有和无 ST 儿童的 X 光片之间的平均年龄差异相似。
使用 Demirjian 法，全景片在确定牙齿发育方面是足够的。与对照组相比，有 ST 的儿童的牙齿发育更为先进。临床医生应牢记，有额外牙的儿童的牙齿发育可能更为超前。
