Naitoh Munetaka, Hiraiwa Yuichiro, Aimiya Hidetoshi, Gotoh Masakazu, Ariji Yoshiko, Izumi Masahiro, Kurita Kenichi, Ariji Eiichiro
Department of Oral and Maxillofacial Radiology, School of Dentistry, Aichi-Gakuin University, and Dental Hospital, Aichi-Gakuin University, Nagoya, Japan.
Implant Dent. 2007 Mar;16(1):24-32. doi: 10.1097/ID.0b013e3180312323.
The location and configuration of mandibular canal variations are important in surgical procedures involving the mandible, such as extraction of an impacted third molar, dental implant treatment, and sagittal split ramus osteotomy. We report 3 Japanese patients with bifid mandibular canals using panoramic radiograph and multi-slice helical computed tomography (CT) images. In 2 of the 5 sides, the bifid mandibular canal was suggested on panoramic radiograph. The bifid mandibular canal had a short and narrow upper canal toward the distal area of the second molar in 4 sides, and a short and narrow lower canal toward the distal area of second molar in 1 side, as revealed on reconstructed CT images. Since the location and configuration of mandibular canal variations are important in surgical procedures involving the mandible, they should be carefully observed using reconstructed CT images.
下颌管变异的位置和形态在涉及下颌骨的外科手术中很重要，如阻生第三磨牙拔除术、牙种植治疗和下颌升支矢状劈开截骨术。我们报告了3例日本患者，通过全景X线片和多层螺旋计算机断层扫描（CT）图像发现存在下颌管双叉畸形。在5侧中的2侧，全景X线片提示存在下颌管双叉畸形。重建CT图像显示，在4侧中，下颌管双叉畸形的上支短而窄，朝向第二磨牙远中区域；在1侧中，下支短而窄，朝向第二磨牙远中区域。由于下颌管变异的位置和形态在涉及下颌骨的外科手术中很重要，因此应使用重建CT图像仔细观察。
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