Department of Stomatology, The First Affiliated Hospital of Bengbu Medical College, 287 Chang Huai Road, Bengbu, China.
Oral Radiol. 2021 Apr;37(2):218-223. doi: 10.1007/s11282-020-00432-3. Epub 2020 Mar 20.
To evaluate the distribution of supernumerary teeth (ST) and the characteristics of mesiodens.
Panoramic radiographs of 48,700 outpatients were used to assess the distribution of ST. A total of 142 cone beam computed tomography (CBCT) images were used to evaluate the characteristics of mesiodens.
A total of 1.24% of individuals aged from 1 to 98 years were diagnosed with ST among 48,700 outpatients, and males had a higher percentage of ST than females (2.94:1); patients aged 6-12 years were the most frequently diagnosed. More females had ST impacted in bone than males. The percentages of patients with 1 and 2 ST were 0.949 and 0.290%, respectively. The most frequent location, crown direction, and morphology of mesiodens were palatal, inverted, and conical, respectively. The tooth lengths of mesiodens in males and of erupted mesiodens were longer than that those in females and of unerupted mesiodens, respectively. Inverted mesiodens had the shortest tooth length compared with vertical and horizontal mesiodens. These results were statistically significant.
The distribution of ST and mesiodens were both related to gender, and patients aged 6-12 years were the most frequently detected. The length of the mesiodens was associated with the growth direction and mesiodens eruption.
评估额外牙（ST）的分布和中切牙的特征。
使用 48700 名门诊患者的全景片评估 ST 的分布。共使用 142 张锥形束 CT（CBCT）图像评估中切牙的特征。
在 48700 名门诊患者中，1-98 岁人群中诊断出 ST 的比例为 1.24%，男性的 ST 比例高于女性（2.94:1）；6-12 岁患者最常被诊断出。女性 ST 骨内埋伏的比例高于男性。1 颗和 2 颗 ST 的患者比例分别为 0.949%和 0.290%。中切牙最常见的位置、冠向和形态分别为腭侧、倒置和锥形。男性的中切牙牙长和萌出的中切牙牙长均长于女性和未萌出的中切牙牙长。与垂直和水平中切牙相比，倒置中切牙的牙长最短。这些结果具有统计学意义。
ST 和中切牙的分布均与性别有关，6-12 岁患者最常被检出。中切牙的长度与生长方向和中切牙萌出有关。
