Division of Radiology, Department of Oral Diagnostic Sciences, Showa University School of Dentistry, Tokyo, Japan.
Oral Surg Oral Med Oral Pathol Oral Radiol. 2013 May;115(5):692-9. doi: 10.1016/j.oooo.2013.02.012.
The study aims at assessing the incidence, course, and characteristics of retromolar canals.
The cone-beam computed tomography images of 171 subjects were evaluated for the presence, course, and pattern of occurrence of retromolar canals.
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.
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.
本研究旨在评估磨牙后管的发生率、走向和特征。
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。
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。
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。
