患者头部的空间方向、金属伪影的减少以及管道电流对牙科种植体附近锥形束计算机断层扫描伪影表达的影响:使用模拟手术导板进行的实验室研究。

IF 1.7 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Imaging Science in Dentistry Pub Date : 2024-06-01 Epub Date: 2024-05-07 DOI:10.5624/isd.20240016
Matheus Barros-Costa, Julia Ramos Barros-Candido, Matheus Sampaio-Oliveira, Deborah Queiroz Freitas, Alexander Tadeu Sverzut, Matheus L Oliveira
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引用次数: 0

摘要

目的:本研究旨在评估锥束计算机断层扫描(CBCT)在不同空间方向、管电流水平和金属伪影减少算法(MAR)条件下获得的牙齿种植体附近的图像伪影:使用手术导板将一个牙科植入体和两个装有不透射线溶液的试管植入下颌骨后部,以确保平行排列。在下颌骨相对于 X 射线投影面的 2 个空间方向(标准和修正)上,以 5、8 和 11 mA 3 个管子电流水平采集 CBCT 扫描。在不植入种植体的情况下重复进行 CBCT 扫描,并在有 MAR 和无 MAR 的情况下进行重建。使用多向方差分析和 Tukey 检验(α=0.05)得出每个管子的平均体素值和噪声值,并进行比较:结果:修改方向的平均体素值明显高于标准方向,噪声值明显低于标准方向(PP>0.05):结论:修改头部的空间方位可提高亮度,降低牙科种植体相邻区域的空间方位噪声,而管电流水平和 MAR 不会产生影响。
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Impact of the spatial orientation of the patient's head, metal artifact reduction, and tube current on cone-beam computed tomography artifact expression adjacent to a dental implant: A laboratory study using a simulated surgical guide.

Purpose: The aim of this study was to evaluate image artifacts in the vicinity of dental implants in cone-beam computed tomography (CBCT) scans obtained with different spatial orientations, tube current levels, and metal artifact reduction algorithm (MAR) conditions.

Materials and methods: One dental implant and 2 tubes filled with a radiopaque solution were placed in the posterior region of a mandible using a surgical guide to ensure parallel alignment. CBCT scans were acquired with the mandible in 2 spatial orientations in relation to the X-ray projection plane (standard and modified) at 3 tube current levels: 5, 8, and 11 mA. CBCT scans were repeated without the implant and were reconstructed with and without MAR. The mean voxel and noise values of each tube were obtained and compared using multi-way analysis of variance and the Tukey test (α=0.05).

Results: Mean voxel values were significantly higher and noise values were significantly lower in the modified orientation than in the standard orientation (P<0.05). MAR activation and tube current levels did not show significant differences in most cases of the modified spatial orientation and in the absence of the dental implant (P>0.05).

Conclusion: Modifying the spatial orientation of the head increased brightness and reduced spatial orientation noise in adjacent regions of a dental implant, with no influence from the tube current level and MAR.

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来源期刊
Imaging Science in Dentistry
Imaging Science in Dentistry DENTISTRY, ORAL SURGERY & MEDICINE-
CiteScore
2.90
自引率
11.10%
发文量
42
期刊最新文献
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