Kalabalık Fahrettin, Yılmaz Neslihan, Aydın Elif Gül, Aytuğar Emre
Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Sakarya University, Sakarya, Turkey.
Department of Pediatric Dentistry, Faculty of Dentistry, Sakarya University, Sakarya, Turkey.
J Dent Sci. 2024 Oct;19(4):2172-2178. doi: 10.1016/j.jds.2024.03.010. Epub 2024 Mar 20.
BACKGROUND/PURPOSE: The objective of this study was to assess the root apical closure ages of first permanent molars retrospectively among a group of western Turkish children aged between 5 and 15 years using cone-beam computed tomography (CBCT).
CBCT images of 202 patients were examined. The patients were divided into 7 groups according to age: ≤8 years, 8-8.99 years, 9-9.99 years, 10-10.99 years, 11-11.99 years, 12-12.99 years, and ≥13 years. Teeth with at least one open apex were considered as 'teeth with open apex' and teeth with all closed apices were considered as 'teeth with closed apex'. The data was evaluated by Pearson Chi-square test and Fisher's exact test. value of <0.05 was considered statistically significant.
Apical closure rate of the maxillary first molars was 4.1%, 32.2%, 55.4%, 76.2%, and 90.6% at 8-8.99 years, 9-9.99 years, 10-10.99 years, 11-11.99 years, and 12-12.99 years, respectively. Apical closure rate of the mandibular first molars was 4.4%, 41.2%, 70.7%, 80.0%, and 92.2% at 8-8.99 years, 9-9.99 years, 10-10.99 years, 11-11.99 years, and 12-12.99 years, respectively. At 12-12.99 years, females had a significantly higher rate of closed root apices of mandibular first molars than males ( < 0.05). At 9-9.99 and 12-12.99 years, females had a significantly higher rate of closed root apices of maxillary molars than males ( < 0.05).
CBCT is a useful tool for the evaluation of root development. The results of present study can provide valuable aids for clinicians during root canal treatment of permanent first molars.
背景/目的：本研究的目的是使用锥形束计算机断层扫描（CBCT）对一组年龄在5至15岁之间的土耳其西部儿童的第一恒磨牙根尖闭合年龄进行回顾性评估。
检查了202例患者的CBCT图像。根据年龄将患者分为7组：≤8岁、8 - 8.99岁、9 - 9.99岁、10 - 10.99岁、11 - 11.99岁、12 - 12.99岁和≥13岁。至少有一个根尖开放的牙齿被视为“根尖开放牙齿”，所有根尖闭合的牙齿被视为“根尖闭合牙齿”。数据通过Pearson卡方检验和Fisher精确检验进行评估。P值<0.05被认为具有统计学意义。
上颌第一磨牙在8 - 8.99岁、9 - 9.99岁、10 - 10.99岁、11 - 11.99岁和12 - 12.99岁时的根尖闭合率分别为4.1%、32.2%、55.4%、76.2%和90.6%。下颌第一磨牙在8 - 8.99岁、9 - 9.99岁、10 - 10.99岁、11 - 11.99岁和12 - 12.99岁时的根尖闭合率分别为4.4%、41.2%、70.7%、80.0%和92.2%。在12 - 12.99岁时，女性下颌第一磨牙根尖闭合率显著高于男性（P<0.05）。在9 - 9.99岁和12 - 12.99岁时，女性上颌磨牙根尖闭合率显著高于男性（P<0.05）。
CBCT是评估牙根发育的有用工具。本研究结果可为临床医生在恒牙第一磨牙根管治疗期间提供有价值的帮助。
