4 674颗下颌前牙根管构型的锥形束CT分析

北京大学学报（医学版） ›› 2014, Vol. 46 ›› Issue (1): 95-99.

4 674颗下颌前牙根管构型的锥形束CT分析

赵莹1,2，董颖韬2，王晓燕1，王祖华1△，李刚3，刘木青3，傅开元3

（1. 北京大学口腔医学院·口腔医院牙体牙髓科，北京100081; 2. 北京市崇文口腔医院口腔内科，北京100062; 3．北京大学口腔医学院·口腔医院放射科，北京100081）

出版日期:2014-02-18 发布日期:2014-02-18

Cone-beam computed tomography analysis of root canal configuration of 4 674 mandibular anterior teeth

ZHAO Ying1,2, DONG Ying-tao2, WANG Xiao-yan1, WANG Zu-hua1△, LI Gang3, LIU Mu-qing3, FU Kai-yuan3

(1. Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology, Beijing 100081, China; 2. Department of Conservative Dentistry, Beijing Chongwen Hospital of Stomatology, Beijing 100062, China; 3. Department of Radiology, Peking University School and Hospital of Stomatology, Beijing 100081, China)

Online:2014-02-18 Published:2014-02-18

摘要/Abstract

摘要： 目的：通过锥形束CT (cone beam CT, CBCT) 研究下颌前牙的根管构型，为临床根管治疗提供参考依据。方法：选取北京大学口腔医学院自2012年10月至2013年7月进行CBCT检查的866名患者的影像资料，由牙髓专业医生和放射专业医生共同筛取未进行根管治疗和牙根发育完整的下颌前牙4 674颗。根据牙位和年龄分组，观察牙根、根管数目和根管构型，并进行分析。结果：下颌中切牙和侧切牙均为单根，0.7% (11/1 542)的尖牙为双根。中切牙、侧切牙与尖牙的双根管率分别为6.7% (105/1 566)，17.4% (273/1 566)和3.0% (46/1 542)。下颌前牙为双根管的患者中，双根管对称发生的比例为中切牙58.7% (37/63)，侧切牙76.1% (108/142)，尖牙29.6% (8/27)。各年龄组下颌中切牙、侧切牙和尖牙双根管率最高的分别为31~40岁年龄组(9.8%, 28/287)，31~40岁年龄组(21.5%, 61/284)，51岁(含51岁)以上年龄组(9.2%, 19/207)。下颌前牙双根管构型多为Type Ⅲ。结论：下颌侧切牙双根管率、双根管对称发生率最高，下颌前牙双根管构型以Type Ⅲ型为主。

关键词: 锥束计算机体层摄影术, 切牙, 牙髓腔, 尖牙, 下颌骨

Abstract: Objective：To investigate the root canal configuration of mandibular anterior teeth with cone beam computed tomography (CBCT). Methods: The CBCT imaging data of 866 patients who visited Peking University School of Stomatology from October 2012 to July 2013 were inspected by an endodontist anda radiologists together. A total of 4 674 mandibular anterior teeth were involved. The number of root, root canals and root canal configuration were observed and analyzed statistically (Chi-squared test). Results: All the mandibular central incisors and lateral incisors were single root, and 0.7% (11/1 542) of canines were double roots. 6.7% (105/1 566) of central incisors, 17.4% (273/1 566) of lateral incisors and 3.0% (46/1 542) of canines had double root canals. The frequency of symmetry of double root canal was 58.7% (37/63) in central incisors, 76.1% (108/142) in lateral incisors and 29.6% (8/27) in canines. The highest frequency of double root canals in different ages was 9.8% (28/287, 31-40 years) in central incisors, 21.5% (61/284, 31-40 years) in lateral incisors and 9.2% (19/207, ≥ 51 years) in canines. Vertucci type Ⅲ canal configurations were the most prevalent in mandibular anterior teeth. Conclusion: The double root canals are most common in mandibular lateral incisors. The highest incidence of symmetry of double root canal is also observed in mandibular lateral incisors. Vertucci type Ⅲ canal configurations are the most frequent type in mandibular anterior teeth.

Key words: Cone-beam computed tomography, Incisor, Dental pulp cavity, Cuspid, Mandible

赵莹，董颖韬，王晓燕，王祖华，李刚，刘木青，傅开元. 4 674颗下颌前牙根管构型的锥形束CT分析[J]. 北京大学学报（医学版）, 2014, 46(1): 95-99.

ZHAO Ying, DONG Ying-tao, WANG Xiao-yan, WANG Zu-hua, LI Gang, LIU Mu-qing, FU Kai-yuan. Cone-beam computed tomography analysis of root canal configuration of 4 674 mandibular anterior teeth[J]. Journal of Peking University(Health Sciences), 2014, 46(1): 95-99.

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