West China Journal of Stomatology ›› 2025, Vol. 43 ›› Issue (3): 431-435.doi: 10.7518/hxkq.2025.2024408

• Case Report • Previous Articles     Next Articles

Microscopic root canal treatment of fused mandibular molar with seven root canals: a case report

Xu Laijun1,2(), Zhang Jianying1,2(), Huang Zihua1,2, Ou Yuemei1,2, Wang Xiangzhu1,2()   

  1. 1.Dept. of Operative Dentistry and Endodontics, Xiangya School of Stomatology, Xiangya Stomatological Hospital, Central South University, Changsha 410008, China
    2.Hunan Clinical Research Center of Oral Major Disease and Oral Health, Changsha 410008, China
  • Received:2024-11-07 Revised:2025-03-17 Online:2025-06-01 Published:2025-06-10
  • Contact: Wang Xiangzhu E-mail:14211220120@fudan.edu.cn;zhjianying@csu.edu.cn;wangxiangzhu_endo@csu.edu.cn;endo@csu.edu.cn
  • Supported by:
    Natural Science Foundation of Hunan Province(S2021JJQNJJ1682);Natural Science Foundation of Changsha City(kq2014215)

Abstract:

Fused teeth are usually formed by the partial or complete fusion of two normal tooth germs during the development process and belong to dental developmental abnormalities. Fused teeth are relatively rare clinically, and those occurring in the posterior tooth area are even rarer. This article reports a case of fused teeth between the first permanent molar and the second permanent molar in the right mandible. This fused tooth had a complex root canal anatomical structure (seven root canals). The number and location of the root canals were analyzed by cone beam computed tomography, and root canal treatment was successfully completed with the assistance of microscope.

Key words: fused teeth, canal anatomy, cone beam computed tomography, microscopic root canal treatment

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