口腔颌面锥形束 CT 中下颌后牙区种植体周围金属伪影
Metal artifacts from posterior mandibular implants as seen in CBCT.
机构信息
Department of Oral and Maxillofacial Radiology, School of Dentistry, Aichi-Gakuin University, Nagoya, Japan.
出版信息
Implant Dent. 2013 Apr;22(2):151-4. doi: 10.1097/ID.0b013e318284aee2.
PURPOSE
Metal artifacts from dental implants have not been clarified in cone-beam computed tomography (CBCT) images in previous studies. Hence, only mesiodistal metal artifacts from dental implants in the posterior mandibular region were assessed using CBCT.
MATERIALS AND METHODS
Twenty-two patients with a total of 61 dental implants in posterior mandibular sites were enrolled. The pixel values surrounding dental implants were measured using CBCT and rotational panoramic radiography, and then the means were calculated.
RESULTS
The mean pixel values between dental implants, between dental implants and neighboring teeth, and posterior to dental implants were significantly lower than between neighboring teeth in CBCT. In addition, the mean pixel value between dental implants did not significantly differ from that between neighboring teeth in rotational panoramic radiography.
CONCLUSIONS
It was concluded that mesiodistal metal artifacts surrounding dental implants are demonstrated on CBCT.
目的
在以往的研究中，锥形束 CT（CBCT）图像并未明确显示种植牙的金属伪影。因此，仅使用 CBCT 评估下颌后牙区种植牙的近远中向金属伪影。
材料与方法
共纳入 22 例患者，总计 61 颗下颌后牙区种植牙。使用 CBCT 和旋转全景片测量种植牙周围的像素值，然后计算平均值。
结果
CBCT 中，种植牙、种植牙与邻牙之间以及种植牙与邻牙之间的平均像素值明显低于邻牙之间。此外，种植牙之间的平均像素值与旋转全景片中邻牙之间的平均像素值无显著差异。
结论
CBCT 可显示种植牙的近远中向金属伪影。
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