通过轴向计算机断层扫描及冠状面和矢状面重建对下颌第三磨牙与下颌管之间的关系进行术前评估。
Preoperative assessment of the relationship between the mandibular third molar and the mandibular canal by axial computed tomography with coronal and sagittal reconstruction.
作者信息
Maegawa Hidenobu, Sano Kazuo, Kitagawa Yoshimasa, Ogasawara Toshiyuki, Miyauchi Kazuki, Sekine Joji, Inokuchi Tsugio
机构信息
Fukui Medical University, Department of Dentistry and Oral Surgery, Fukui, Japan.
出版信息
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2003 Nov;96(5):639-46. doi: 10.1016/s1079-2104(03)00356-1.
OBJECTIVE
We sought to evaluate the relationship between the mandibular third molar and the mandibular canal by using axial computed tomography with coronal and sagittal reconstruction for third molar surgery.
STUDY DESIGN
Forty-seven impacted third molars in 41 patients were found in close association with the mandibular canal during a panoramic radiographic assessment. The relationship between the mandibular third molar and the mandibular canal was evaluated by using computed tomography and compared in terms of operative exposure of the inferior alveolar nerve and postoperative labial dysesthesia.
RESULTS
Twenty-four (51%) mandibular canals were buccal relative to the third molar, 12 were lingual, 9 were inferior, and 2 were between roots. At the time of the surgical procedure, the inferior alveolar nerve was visible in 7 patients. Postoperative lower lip dysesthesia occurred in 1 patient whose mandibular canal was in the lingual position.
CONCLUSIONS
Axial computed tomography with coronal and sagittal reconstruction provides useful information to surgeons regarding the relationship between the mandibular third molar and the mandibular canal.
目的
我们试图通过使用轴向计算机断层扫描以及冠状面和矢状面重建技术来评估下颌第三磨牙与下颌管之间的关系，以用于第三磨牙手术。
研究设计
在全景放射学评估中发现，41例患者的47颗阻生第三磨牙与下颌管密切相关。通过计算机断层扫描评估下颌第三磨牙与下颌管之间的关系，并就下牙槽神经的手术暴露情况和术后唇部感觉异常进行比较。
结果
24条（51%）下颌管位于第三磨牙颊侧，12条位于舌侧，9条位于下方，2条位于牙根之间。手术时，7例患者的下牙槽神经可见。术后下唇感觉异常发生在1例下颌管位于舌侧位置的患者身上。
结论
轴向计算机断层扫描以及冠状面和矢状面重建技术为外科医生提供了有关下颌第三磨牙与下颌管之间关系的有用信息。
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