Department of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Jiangsu Province, Zhong Yang Road 30, Nanjing City, 210008, People's Republic of China.
Clin Oral Investig. 2022 Oct;26(10):6151-6157. doi: 10.1007/s00784-022-04564-0. Epub 2022 Jun 7.
This study aimed to compare posterior tooth root fractures in endodontically treated teeth versus nonendodontically treated teeth in the Chinese population.
We investigated 500 root fractured posterior teeth in 461 Chinese patients. The clinical information (age, sex of patients, tooth type) were recorded. The fractured teeth were divided into endodontically treated root fractured (ETRF) teeth and nonendodontically treated root fractured (NETRF) teeth. The morphology of the fractured root (circular, oval, other), the orientation of fracture lines (vertical and non-vertical), the restorations performed (crown, filling, non-filling), and the position of the teeth in the dental arch (normal, misaligned) were evaluated based on cone-beam computed tomography images. These data were compared between 2015 and 2019. ETRF% was calculated as ETRF/ETRF + NETRF. Vertical% was calculated as vertical/vertical + non-vertical.
There were 177 ETRF teeth and 323 NETRF teeth in this population. The total ETRF% was 29.3% in 2015 and 37.6% in 2019 (P = 0.087). The proportion of vertical root fracture in the ETRF group increased significantly in 2019 compared with that in 2015 (46.2% vs. 80.2%, P = 0.000). The ETRF% in female patients increased by 16.8%, but increased by only 1.2% in male patients in 2019 compared with that in 2015. The ETRF% of mandibular and maxillary premolars increased by 48.5% and 29.3%, respectively. The proportion of crown restoration increased by 2.4% in 2019 compared with that in 2015 in the ETRF group.
The proportion of NETRF teeth and non-vertical root fractures in posterior teeth is high in this Chinese population. The number of vertical root fractures in endodontically treated teeth increased significantly from 2015 to 2019.
More attention should be paid to endodontic treatment factors in the occurrence of root fractures, especially as female patients and premolars are more susceptible.
本研究旨在比较中国人群中牙髓治疗后的牙齿和未进行牙髓治疗的牙齿的后牙根折。
我们调查了 461 名中国患者的 500 颗根折后牙。记录了临床信息（患者年龄、性别、牙齿类型）。将折裂的牙齿分为牙髓治疗后根折（ETRF）牙齿和未牙髓治疗后根折（NETRF）牙齿。根据锥形束 CT 图像评估折裂根的形态（圆形、椭圆形、其他）、折裂线的方向（垂直和非垂直）、进行的修复（牙冠、充填、未充填）以及牙齿在牙弓中的位置（正常、错位）。这些数据在 2015 年和 2019 年之间进行了比较。ETRF%计算为 ETRF/ETRF+NETRF。垂直%计算为垂直/垂直+非垂直。
在该人群中，有 177 颗 ETRF 牙齿和 323 颗 NETRF 牙齿。2015 年总 ETRF%为 29.3%，2019 年为 37.6%（P=0.087）。与 2015 年相比，2019 年 ETRF 组中垂直根折的比例显著增加（46.2%比 80.2%，P=0.000）。女性患者的 ETRF%增加了 16.8%，而男性患者仅增加了 1.2%。下颌和上颌前磨牙的 ETRF%分别增加了 48.5%和 29.3%。2019 年 ETRF 组中牙冠修复的比例比 2015 年增加了 2.4%。
在中国人群中，后牙的 NETRF 牙齿和非垂直根折的比例较高。2015 年至 2019 年，牙髓治疗后的牙齿中垂直根折的数量显著增加。
应更加关注根折发生的牙髓治疗因素，尤其是女性患者和前磨牙更易发生根折。
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