Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, 373 West Xueyuan Road, Wenzhou, 325027, Zhejiang Province, People's Republic of China.
Wenzhou Medical University, University Town, Chashan, Wenzhou, 325035, Zhejiang Province, People's Republic of China.
Clin Oral Investig. 2019 Jan;23(1):81-86. doi: 10.1007/s00784-018-2409-y. Epub 2018 Mar 22.
To analyze the incidence and distribution of branch canals in mandibular anterior teeth.
Three hundred mandibular anterior teeth, comprising 100 central incisors, 100 lateral incisors, and 100 canines, were scanned using a micro-computed tomography (micro-CT) system. Three-dimensional (3-D) visualization reconstruction of the root canal system and its branch canals was performed on each specimen. Data regarding the number of branch canals, the distance from the anatomical apex to the branch canal, and the orientation of each branch orifice were collected and analyzed.
One hundred and fifty-three primary branch canals and 35 secondary branch canals were detected in the specimens overall. The incidence of branch canals in mandibular anterior teeth was 34%, with the highest incidence (50%) exhibited in mandibular canines, followed by lateral incisors (29%). Of the 153 primary branch canals found in the mandibular anterior tooth samples investigated, 82.35% appeared within 3 mm of the apical region, while 71.90% were labial and lingual canals.
There was regularity in the distribution and orientation of branch canals in mandibular anterior teeth.
This knowledge may be employed as a guide in clinical endodontic therapy.
分析下颌前牙分支根管的发生率和分布。
使用微计算机断层扫描（micro-CT）系统对 300 颗下颌前牙（包括 100 颗中切牙、100 颗侧切牙和 100 颗尖牙）进行扫描。对每个样本的根管系统及其分支根管进行三维（3-D）可视化重建。收集和分析分支根管数量、从解剖根尖到分支根管的距离以及每个分支口的方向的数据。
在所有标本中，共检测到 153 个主分支根管和 35 个次分支根管。下颌前牙分支根管的发生率为 34%，其中下颌尖牙的发生率最高（50%），其次是侧切牙（29%）。在所研究的下颌前牙样本中，发现的 153 个主分支根管中有 82.35%出现在根尖区 3mm 以内，其中 71.90%为唇舌根管。
下颌前牙分支根管的分布和走向具有规律性。
该知识可作为临床牙髓治疗的指南。
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