Department of Pediatric Dentistry, Faculty of Dentistry, Afyonkarahisar Health Sciences University, 03030 Afyonkarahisar, Turkey.
J Clin Pediatr Dent. 2023 Mar;47(2):50-57. doi: 10.22514/jocpd.2023.011. Epub 2023 Mar 3.
Persistent primary teeth (PPT) may occur due to various local factors, or it may develop due to general factors such as systemic diseases and syndromes. Since eruption and dental development are two different processes, it is important to investigate both processes to determine the actual cause of delayed tooth eruption. The study aimed to evaluate the dental development of a group of Turkish children with multiple PPT using the Willems dental age estimation method.
Digital panoramic radiographs of children and adolescents aged between 9 and 15 years were retrieved, assessed and categorized. A total of 80 radiographs of patients with more than one PPT were selected and matched with children without PPT. Dental age was calculated using the method of Willems . All analyses were conducted using the SPSS statistical software. The statistical significance was set at 0.05.
The permanent tooth development of children with multiple PPT could be delayed by 0.5-4 years compared to healthy ones. A strong positive correlation was found between the number of PPT and deviation for both females and males ( < 0.001).
In conclusion, we found that permanent tooth development of children with multiple PPT could be delayed compared to healthy ones. In addition, as the number of PPT increased, the difference between chronological age and dental age also increased, especially in males.
持续性乳牙（PPT）可能由于各种局部因素引起，也可能由于系统性疾病和综合征等一般因素引起。由于萌出和牙齿发育是两个不同的过程，因此重要的是要调查这两个过程，以确定牙齿萌出延迟的实际原因。本研究旨在使用 Willems 牙龄评估法评估一组患有多发性 PPT 的土耳其儿童的牙齿发育情况。
检索、评估和分类了 9 至 15 岁儿童和青少年的数字化全景射线照片。选择了 80 张患有多发性 PPT 的患者的射线照片，并与没有 PPT 的儿童相匹配。使用 Willems 方法计算牙龄。所有分析均使用 SPSS 统计软件进行。统计学意义设定为 0.05。
与健康儿童相比，患有多发性 PPT 的儿童的恒牙发育可能延迟 0.5-4 年。女性和男性的 PPT 数量与偏差之间均存在强正相关（<0.001）。
总之，我们发现与健康儿童相比，患有多发性 PPT 的儿童的恒牙发育可能会延迟。此外，随着 PPT 数量的增加，牙龄与实际年龄之间的差异也会增加，尤其是在男性中。
