Yang Shengjun, Lu Ben, Liu Jingyi, Yang Haochuan, Si Yuan, Wang Dongmiao
Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, 136 Hanzhong Road, Nanjing, 210029, Jiangsu Province, People's Republic of China.
State Key Laboratory Cultivation Base of Research, Prevention and Treatment for Oral Disease, Nanjing Medical University, Jiangsu, People's Republic of China.
Oral Radiol. 2025 May 14. doi: 10.1007/s11282-025-00829-y.
This study aimed to evaluate the detrimental effects of single unilaterally impacted mesiodens on the root development of adjacent maxillary central incisors and to explore the key influencing factors.
A total of 552 patients aged 5-12 years with single unilaterally impacted mesiodens were included in the study. The maxillary central incisor with greater overlap with the mesiodens in the coronal view was identified as the affected tooth, while the contralateral central incisor served as the control one. Cone-beam computed tomography (CBCT) data for these patients were retrospectively analyzed to compare the root lengths and root formation stages of the maxillary central incisors on both sides. Multivariate logistic regression and generalized linear models were used to investigate the critical 3-dimensional (3D) characteristics that influence the root development of adjacent maxillary central incisors.
Maxillary central incisors on the affected side exhibited significantly shorter root lengths and less-advanced root formation stages compared to those on the control side. Impacted mesiodens with tuberculate or germ morphology, normal or undefined orientation, and a position superior to dental cervix of contralateral central incisor were associated with higher risk of impairing root development of adjacent central incisors.
Impacted mesiodens can impair the root development of adjacent central incisors. Early removal of high-risk mesiodens is essential for safeguarding the future development of adjacent maxillary central incisors.
本研究旨在评估单侧单个埋伏中切牙对相邻上颌中切牙牙根发育的不良影响，并探讨关键影响因素。
本研究共纳入552例5至12岁单侧单个埋伏中切牙患者。在冠状位视图中与中切牙重叠较多的上颌中切牙被确定为患牙，对侧中切牙作为对照牙。对这些患者的锥形束计算机断层扫描（CBCT）数据进行回顾性分析，以比较双侧上颌中切牙的牙根长度和牙根形成阶段。采用多变量逻辑回归和广义线性模型研究影响相邻上颌中切牙牙根发育的关键三维（3D）特征。
与对照侧相比，患侧上颌中切牙的牙根长度明显较短，牙根形成阶段较落后。具有结节状或胚芽形态、正常或未定义方向以及位于对侧中切牙牙颈部上方位置的埋伏中切牙，与损害相邻中切牙牙根发育的较高风险相关。
埋伏中切牙会损害相邻中切牙的牙根发育。早期拔除高危中切牙对于保障相邻上颌中切牙的未来发育至关重要。
