Department of Pediatric Dentistry, School of Dentistry, Institute of Transitional Dental Sciences, Dental Research Institute, Pusan National University, Yangsan, Korea.
Int J Paediatr Dent. 2018 Mar;28(2):161-169. doi: 10.1111/ipd.12317. Epub 2017 Jul 8.
Mesiodens can be associated with several complications. The optimal age for treatment, however, remains controversial.
To investigate the three-dimensional (3D) positions of mesiodens using cone-beam computed tomography (CBCT) and determine the association of eruption-related complications of mesiodens with these 3D positions and delayed development of the central incisors.
In total, 293 Korean children (383 supernumerary teeth) aged 4-10 years with no history of orthodontic treatment were included. CBCT and panoramic radiography data for all patients were retrospectively investigated with regard to the 3D positions of mesiodens, apical maturity of the permanent first molars, delayed development of the central incisors relative to the apical maturity of the permanent first molars (Nolla's stage), and eruption-related complications of mesiodens.
Eruption-related complications were not correlated with any 3D characteristic other than the 'within the arch' position of mesiodens, while they showed a significant correlation with delayed development of the central incisors (P < 0.05).
Mesiodens caused eruption-related complications in 33.7% patients. Moreover, the risk of these complications was higher when mesiodens caused delayed development of the central incisors. These findings can aid clinicians in planning appropriate and timely treatment for mesiodens, with focus on minimising patient discomfort.
多生牙可伴发多种并发症，但其最佳治疗时机仍存在争议。
通过锥形束 CT（CBCT）研究多生牙的三维（3D）位置，并确定多生牙萌出相关并发症与这些 3D 位置以及中切牙迟萌的相关性。
共纳入 293 名（383 颗）无正畸治疗史的 4-10 岁韩国儿童，回顾性分析所有患者的 CBCT 和全景片数据，以评估多生牙的 3D 位置、第一恒磨牙的根尖发育情况、中切牙相对于第一恒磨牙根尖发育的迟萌情况（Nolla 分期）以及多生牙的萌出相关并发症。
除多生牙的“位于牙弓内”位置外，萌出相关并发症与任何 3D 特征均无相关性，而与中切牙迟萌有显著相关性（P<0.05）。
33.7%的患者有多生牙萌出相关并发症，且多生牙导致中切牙迟萌时，其发生并发症的风险更高。这些发现有助于临床医生制定适当和及时的多生牙治疗计划，重点是尽量减少患者的不适。
