Naitoh Munetaka, Katsumata Akitoshi, Hiraiwa Yuichiro, Aimiya Hidetoshi, Ohsaki Chiaki, Ariji Eiichiro
Department of Oral and Maxillofacial Radiology, School of Dentistry, Aichi-Gakuin University, Nagoya, Japan.
Implant Dent. 2008 Sep;17(3):271-7. doi: 10.1097/ID.0b013e318182d7a4.
Multislice helical computed tomography (CT), which can provide detailed 2-D and 3-D reconstructed images, is useful in imaging diagnosis for dental implant treatment. Therefore, in this study, it was performed to clarify the mandibular depiction of double-oblique reconstructed images when changing their thickness.
A total of 38 sites in the mandibular molar region were examined using multislice helical CT. The thicknesses of the double-oblique images using multislice helical CT scans were reconstructed in 4 conditions: 0.3 mm, 0.9 mm, 1.6 mm, and 4.1 mm. In double-oblique images, mandibular depiction was evaluated by 5 oral radiologists using a subjective rating score.
In the alveolar crest and the whole of the mandibular canal, the highest value was obtained with 0.9 mm-thick images; however, there was no significant difference between 0.3 mm and 0.9 mm-thick images.
We concluded that depiction of the superior wall of the mandibular canal cannot be improved by changing the thickness of images.
多层螺旋计算机断层扫描（CT）能够提供详细的二维和三维重建图像，对牙种植治疗的影像诊断很有帮助。因此，在本研究中，旨在阐明改变双层斜位重建图像厚度时下颌骨的显示情况。
使用多层螺旋CT对下颌磨牙区的38个部位进行检查。多层螺旋CT扫描的双层斜位图像厚度在4种条件下重建：0.3毫米、0.9毫米、1.6毫米和4.1毫米。在双层斜位图像中，5名口腔放射科医生使用主观评分对下颌骨显示情况进行评估。
在牙槽嵴和整个下颌管中，0.9毫米厚的图像得分最高；然而，0.3毫米和0.9毫米厚的图像之间没有显著差异。
我们得出结论，改变图像厚度并不能改善下颌管上壁的显示。
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