磨牙后管在锥形束 CT 下的观察：其发生率、走行和特征。
Retromolar canals as observed on cone-beam computed tomography: their incidence, course, and characteristics.
机构信息
Division of Radiology, Department of Oral Diagnostic Sciences, Showa University School of Dentistry, Tokyo, Japan.
出版信息
Oral Surg Oral Med Oral Pathol Oral Radiol. 2013 May;115(5):692-9. doi: 10.1016/j.oooo.2013.02.012.
OBJECTIVE
The study aims at assessing the incidence, course, and characteristics of retromolar canals.
STUDY DESIGN
The cone-beam computed tomography images of 171 subjects were evaluated for the presence, course, and pattern of occurrence of retromolar canals.
RESULTS
Three types of retromolar canals namely A, B, & C were detected in 129 subjects. Type A branched off the mandibular canal distal to third molar to open into retomolar fossa, type B coursed between retromolar fossa and radicular portion of third molar, type C coursed from mandibular foramen anteroinferiorly to exit into retromolar fossa. The type B retromolar canal presented features distinguishing it from other types.
CONCLUSIONS
Considerable number of individuals presented with retromolar canals emphasizing their significance in surgeries involving the retromolar area. The type B pattern, to the best of our knowledge, hasn't been reported by most researchers and hence, could be considered as an additional type of retromolar canal.
目的
本研究旨在评估磨牙后管的发生率、走向和特征。
研究设计
评估了 171 名受试者的锥形束 CT 图像，以评估磨牙后管的存在、走向和发生模式。
结果
在 129 名受试者中检测到三种类型的磨牙后管，即 A、B 和 C 型。A型从第三磨牙远中分支于下颌管进入磨牙后窝，B 型位于磨牙后窝和第三磨牙根部分叉，C 型从下颌孔向前下进入磨牙后窝。B 型磨牙后管具有区别于其他类型的特征。
结论
相当数量的个体存在磨牙后管，这强调了它们在涉及磨牙后区的手术中的重要性。据我们所知，B 型模式尚未被大多数研究人员报道，因此可以被认为是一种额外的磨牙后管类型。
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