Moreno Rabie C, Vranckx M, Rusque M I, Deambrosi C, Ockerman A, Politis C, Jacobs R
OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, and Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium; Department of Oral and Maxillofacial Radiology, Universidad de los Andes, Santiago, Chile.
OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, and Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.
Br J Oral Maxillofac Surg. 2019 Oct;57(8):765-770. doi: 10.1016/j.bjoms.2019.07.006. Epub 2019 Jul 24.
The study was designed to assess, by direct anatomical observations and cone-beam computed tomography (CT), the prevalence of a retromolar canal and foramen in relation to the mandibular third molar in dry human mandibles. Dry mandibles from European skeletons (n=89) were observed directly and after cone-beam CT scanning (Newtom VGI evo). The following variables were assessed: the presence of a retromolar foramen and canal; the presence of a third molar, and orientation of the third molar. From the total of 89 mandibles selected, 73 showed a retromolar foramen (49 of which were bilateral). A retromolar canal was identified in 64 mandibles based on cone-beam CT assessment, with a total of 101 canals, including 74 that were bilateral. A total of 112 hemimandibles contained a third molar. Orientation of the third molar did not seem to indicate the presence of retromolar foramina or canals. A similar prevalence of retromolar canals was found for both vertically (41/79) and mesially (17/33) orientated third molars. A retromolar foramen and canal were present in most mandibles, with more than half being bilateral. We were unable to confirm a potential relation between the retromolar foramen and canal on the one hand, and the orientation of the third molar on the other.
本研究旨在通过直接解剖观察和锥束计算机断层扫描（CT），评估干燥人类下颌骨中磨牙后管和孔相对于下颌第三磨牙的患病率。对来自欧洲骨骼的干燥下颌骨（n = 89）进行了直接观察，并在锥束CT扫描（Newtom VGI evo）后进行观察。评估了以下变量：磨牙后孔和管的存在；第三磨牙的存在以及第三磨牙的方向。在所选的89个下颌骨中，73个显示有磨牙后孔（其中49个为双侧）。根据锥束CT评估，在64个下颌骨中发现了磨牙后管，共有101条管，其中74条为双侧。共有112个半下颌骨含有第三磨牙。第三磨牙的方向似乎并未表明磨牙后孔或管的存在。垂直（41/79）和近中（17/33）方向的第三磨牙的磨牙后管患病率相似。大多数下颌骨中都存在磨牙后孔和管，其中一半以上为双侧。我们无法证实一方面磨牙后孔和管与另一方面第三磨牙的方向之间存在潜在关系。
