West China Journal of Stomatology ›› 2023, Vol. 41 ›› Issue (6): 671-677.doi: 10.7518/hxkq.2023.2023110

• Clinical Research • Previous Articles     Next Articles

Imaging analysis of 1 138 supernumerary teeth by using cone-beam computed tomography

Liu Xiaolin(), Ren Qun, Bai Jiuping, Kang Pei, Ren Guiyun, Li Xiangjun, Feng Xiaowei.   

  1. Dept. of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Hebei Medical University, Hebei Key Laboratory of Stomatology, Hebei Clinical Research Center for Oral Diseases, Shijiazhuang 050017, China
  • Received:2023-04-10 Revised:2023-10-11 Online:2023-12-01 Published:2023-11-27
  • Contact: Feng Xiaowei. E-mail:1048507074@qq.com
  • Supported by:
    Hebei Province University Science and Technology Research Project(QN2021105);Hebei Provincial Government Funded Clinical Medicine Excellent Talent Training Project(361029);Correspondence: Feng Xiaowei, E-mail: fengxiaowei.good@163.com


Objective This study aims to analyze and summarize the characteristics of supernumerary teeth by using cone-beam computed tomography (CBCT). Methods A total of 718 patients with 1 138 supernumerary teeth were retrospectively collected. Age, gender, number, location, morphology, eruption status, and accompanying symptoms of the supernumerary teeth were statistically analyzed. The relationship relative to jaws, gender, and eruption status were analyzed and discussed. Results The average age of the patients was 9.54±5.32 years, and the male to female ratio was 2.88∶1. About 77.02% of the patients sought medical advice during the mixed dentition period, and 50.70% had one supernumerary tooth. These supernumeraries were most commonly conical in shape, and 85.76% of them were in the incisor region, 92.09% in the upper jaw, 46.75% in inverted position, and 86.20% unerupted. Overall, 65.29% of them had fully developed roots, and 60.63% had an impact on adjacent structures. Significant differences were found in eruption status, morphology, zoning, direction, root development, and impact on adjacent structures between the supernumerary teeth located in the upper and lower jaws (P<0.05). Significant differences were also detected in gender, morphology, zoning, orientation, root development, and impact on adjacent structures between erupted and unerupted teeth (P<0.05). The incidence of supernumerary teeth in the incisor region was higher in males than that in females. Moreover, the root of supernumeraries was more completely developed in males than in females (P<0.05). Conclusion For supernumerary teeth, CBCT images can provide accurate three-dimensional radiographic data and are valuable for clinical diagnosis and treatment planning.

Key words: supernumerary teeth, cone-beam computed tomography, radiographic features, diagnosis, treatment

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