使用锥形束计算机断层扫描观察下颌骨双管。
Observation of bifid mandibular canal using cone-beam computerized tomography.
作者信息
Naitoh Munetaka, Hiraiwa Yuichiro, Aimiya Hidetoshi, Ariji Eiichiro
机构信息
Department of Oral and Maxillofacial Radiology, School of Dentistry, Aichi-Gakuin University, 2-11, Suemori-Dori, Chikusa-Ku, Nagoya 464-8651, Japan.
出版信息
Int J Oral Maxillofac Implants. 2009 Jan-Feb;24(1):155-9.
PURPOSE
Some variations of the mandibular canal (so-called bifid mandibular canal) have been reported using various radiography techniques; however, the occurrences of bifid mandibular canal were less than 1% according to panoramic radiographic surveys. The purpose of the present investigation was to clarify the rate and type of bifid mandibular canal in the mandibular ramus region, as observed using cone-beam computerized tomography (CBCT) images.
MATERIALS AND METHODS
One hundred twenty-two patients who had undergone preoperative imaging of dental implant treatment using CBCT were enrolled in the investigation. Two-dimensional (2D) images of various planes in the mandibular ramus region were reconstructed on a computer using three-dimensional visualization and measurement software. The course of the mandibular canal was observed and the length of the bifid canal was measured.
RESULTS
Bifid mandibular canal in the mandibular ramus region was observed in 65% of patients and 43% of sides. Bifid mandibular canal can be classified into four types: retromolar, dental, forward, and buccolingual canals.
CONCLUSION
Bifid mandibular canal was observed at a high rate using CBCT.
目的
已通过各种放射成像技术报告了下颌管的一些变异情况（所谓的双下颌管）；然而，根据全景放射学调查，双下颌管的发生率低于1%。本研究的目的是通过锥形束计算机断层扫描（CBCT）图像来明确下颌支区域双下颌管的发生率和类型。
材料与方法
122例接受了使用CBCT进行牙种植治疗术前成像的患者纳入本研究。使用三维可视化和测量软件在计算机上重建下颌支区域不同平面的二维（2D）图像。观察下颌管的走行并测量双管的长度。
结果
65%的患者和43%的侧别在下颌支区域观察到双下颌管。双下颌管可分为四种类型：磨牙后管、牙管、向前管和颊舌管。
结论
使用CBCT观察到双下颌管的发生率较高。
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