Li Shaorong, Min Ziheng, Wang Tianhao, Hou Benxiang, Su Zheng, Zhang Chen
Department of Endodontics, Beijing Stomatological Hospital, Capital Medical University, Tian Tan Xi Li No.4, Beijing, 100050, China.
Salivary Gland Disease Center, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Beijing Laboratory of Oral Health and Beijing Stomatological Hospital, Capital Medical University, Tian Tan Xi Li No.4, Beijing, 100050, China.
BMC Oral Health. 2025 Jan 2;25(1):5. doi: 10.1186/s12903-024-05294-3.
To evaluate the prevalence and characteristics of taurodontism in northern China by using cone-beam computed tomography (CBCT) and assisting the treatment.
The study involved CBCT scans of 8112 teeth from 507 participants of northern China, comprising 217 males and 290 females aged 18 to 60. Analysis was conducted using Shifman and Chanannel's criteria to assess the prevalence and attributes of taurodontism, examining differences based on tooth position (maxilla and mandible) as well as gender (P < 0.05). Specific morphology including C-shaped canal was recorded. The curvature of the canals was measured using a modified Schneider method. Moreover, we reported two failure cases with taurodontism referred to a retreatment.
Taurodontism was observed in 113 participants, affecting 23.50% of the males and 21.38% of the females in at least one tooth (P > 0.05). The prevalence was significant higher in maxilla (P < 0.05). The highest incidence of taurodontism was detected in premolars, 9.86% in the maxillary first premolars, and in molars, with 3.94% in the maxillary first molars. Regarding canal curvature, a higher incidence of curved canal could be found in maxillary and mandibular molars of taurodontism (47.50-66.67%), alongside an elevated prevalence of C-shaped taurodontism in mandibular second molars (71.43%). After follow-up, the healing response was satisfactory in both cases.
The study highlighted a higher incidence of taurodontism in maxilla, indicating a significant association between taurodontism, C-shaped characteristics, and canal curvature. Dentists are advised to carefully consider the presence of special morphologies during taurodontism treatment.
通过使用锥形束计算机断层扫描（CBCT）评估中国北方地区牛牙症的患病率及特征，并辅助治疗。
该研究对来自中国北方地区507名参与者的8112颗牙齿进行了CBCT扫描，其中包括217名男性和290名女性，年龄在18至60岁之间。采用希夫曼（Shifman）和查南尔（Chanannel）的标准进行分析，以评估牛牙症的患病率和特征，检查基于牙齿位置（上颌和下颌）以及性别的差异（P < 0.05）。记录包括C形根管在内的具体形态。使用改良的施奈德（Schneider）方法测量根管的弯曲度。此外，我们报告了两例因牛牙症而进行再治疗的失败病例。
在113名参与者中观察到牛牙症，至少一颗牙齿受影响的男性占23.50%，女性占 21.38%（P > 0.05）。在上颌中患病率显著更高（P < 0.05）。牛牙症发病率最高的是前磨牙，上颌第一前磨牙为9.86%，磨牙中上颌第一磨牙为3.94%。关于根管弯曲度，在牛牙症的上颌和下颌磨牙中发现弯曲根管的发生率更高（47.50 - 66.67%），同时在下颌第二磨牙中C形牛牙症的患病率也有所升高（71.43%）。随访后，两例病例的愈合反应均令人满意。
该研究突出了上颌中牛牙症的较高发病率，表明牛牙症、C形特征和根管弯曲度之间存在显著关联。建议牙医在牛牙症治疗期间仔细考虑特殊形态的存在。
