Naitoh Munetaka, Katsumata Akitoshi, Kubota Yukinobu, Hayashi Masanori, Ariji Eiichiro
Department of Oral and Maxillofacial Radiology, School of Dentistry, Aichi-Gakuin University, 2-11, Suemori-Dori, Chikusa-Ku, Nagoya 464-8651, Japan.
Implant Dent. 2009 Apr;18(2):112-8. doi: 10.1097/ID.0b013e318198da7e.
The location and configuration of the mandibular canal are important in imaging diagnosis for mandibular posterior dental implant treatment. The purpose of the present investigation was to clarify the relationship between the depiction of the mandibular canal in digital panoramic images and cancellous bone density assessed using multislice computed tomographic images.
Twenty-three patients, all with a designed dental implant in the mandibular molar region, were enrolled in the investigation. Depiction of the mandibular canal was classified into 3 types using digital panoramic images. Rectangular regions of interest were set in cancellous bone of designed implant sites and averaged pixel values of regions of interest were calculated.
The mean pixel value in the site of the mandibular canal visible in the superior and inferior walls was significantly larger in comparison with that invisible in the superior and inferior walls.
The depiction of the mandibular canal in digital panoramic images was related to bone density in the alveolar region.
下颌管的位置和形态在进行下颌后牙种植治疗的影像诊断中很重要。本研究的目的是阐明数字化全景图像中下颌管的显示与使用多层计算机断层扫描图像评估的松质骨密度之间的关系。
本研究纳入了23例计划在下颌磨牙区植入牙种植体的患者。使用数字化全景图像将下颌管的显示分为3种类型。在计划植入部位的松质骨中设置矩形感兴趣区，并计算感兴趣区的平均像素值。
与上下壁不可见的下颌管部位相比，上下壁可见的下颌管部位的平均像素值显著更大。
数字化全景图像中下颌管的显示与牙槽区的骨密度有关。
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