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Analysis of the distribution of supernumerary teeth and the characteristics of mesiodens in Bengbu, China: a retrospective study

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Abstract

Objectives

To evaluate the distribution of supernumerary teeth (ST) and the characteristics of mesiodens.

Methods

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.

Results

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.

Conclusions

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.

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Acknowledgements

We thank Dr. Fuyong Hu for his kind support in statistics. This study was funded by the Key Research and Development Projects of Department of Science and Technology of Anhui Province [Grant Number 1804h08020290].

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Author notes

  1. Lili Zhao and Shanshan Liu have equally contributed to this work.

Authors and Affiliations

  1. Department of Stomatology, The First Affiliated Hospital of Bengbu Medical College, 287 Chang Huai Road, Bengbu, China

    Lili Zhao, Shanshan Liu, Rongxiu Zhang, Ren Yang, Kai Zhang & Xiaofei Xie

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  1. Lili Zhao
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  2. Shanshan Liu
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Corresponding author

Correspondence to Xiaofei Xie.

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Conflict of interest

Lili Zhao, Shanshan Liu, Rongxiu Zhang, Ren Yang, Kai Zhang, and Xiaofei Xie declare that they have no conflict of interest.

Human and animal rights statement

All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions. Informed consent was obtained from all patients for being included in the study.

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Zhao, L., Liu, S., Zhang, R. et al. Analysis of the distribution of supernumerary teeth and the characteristics of mesiodens in Bengbu, China: a retrospective study. Oral Radiol 37, 218–223 (2021). https://doi.org/10.1007/s11282-020-00432-3

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  • DOI: https://doi.org/10.1007/s11282-020-00432-3

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