Phantom study for CT artifacts of dental titanium implants and zirconia upper structures: the effects of occlusal plane angle setting and SEMAR algorithm.

IF 1.6 3区医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

Oral Radiology Pub Date : 2024-04-01 Epub Date: 2023-12-26 DOI:10.1007/s11282-023-00730-6

Ryoji Kitami, Masahiro Izumi, Motoe Taniguchi, Yusuke Kozai, Takashi Sakurai

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引用次数: 0

Abstract

Objectives: The single-energy metal artifact reduction (SEMAR) algorithm effectively reduces metal artifacts in computed tomography (CT). The study aimed to evaluate the effect of the occlusal plane angle on metal artifacts caused by dental implants and zirconia upper structures, and the effectiveness of SEMAR for CT prognostic evaluation.

Methods: Part of a bovine rib was used as the mandibular implant phantom. First, the phantom immersed in a water tank was scanned using CT to obtain the control image under certain conditions. Subsequently, three titanium implant bodies were implanted in a straight line into the phantom, and a zirconia superstructure was attached. CT scans were performed. The CT-reconstructed images were obtained with and without SEMAR processing. Twelve regions of interest (ROIs) were set at the same site on each sagittal image, and the CT values were measured at all the ROIs. The CT values of the ROIs in the control images and those of the ROIs with and without SEMAR were compared.

Results: The variations in the occlusal plane angle during CT imaging negligibly affected the number of regions in which metal artifacts appeared. SEMAR improved the CT value of the trabecular bone, which was affected by metal artifacts.

Conclusion: This study showed that the occlusal plane angle occasionally did not affect the area of metal artifacts caused by dental implants or zirconia upper structures. Other results indicate that SEMAR is effective for accurately evaluating the alveolar bone around the implant body by reducing metal artifacts.

Abstract Image

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牙科钛种植体和氧化锆上部结构 CT 伪影研究：咬合平面角度设置和 SEMAR 算法的影响。

目的：单能量金属伪影减少（SEMAR）算法可有效减少计算机断层扫描（CT）中的金属伪影。本研究旨在评估咬合面角度对牙科种植体和氧化锆上部结构造成的金属伪影的影响，以及 SEMAR 在 CT 预后评估中的有效性：方法：使用牛肋骨的一部分作为下颌种植体模型。方法：用牛肋骨的一部分作为下颌种植体模型，首先使用 CT 扫描浸泡在水箱中的模型，以获得特定条件下的对照图像。随后，将三个钛种植体直线植入模型，并连接氧化锆上部结构。进行 CT 扫描。在进行和未进行 SEMAR 处理的情况下，均获得了 CT 重建图像。在每个矢状面图像的同一部位设置了 12 个感兴趣区（ROI），并测量了所有 ROI 的 CT 值。将对照图像中 ROI 的 CT 值与经过和未经过 SEMAR 处理的 ROI 的 CT 值进行比较：结果：CT 成像过程中咬合平面角度的变化对出现金属伪影的区域数量影响微乎其微。SEMAR 提高了受金属伪影影响的骨小梁的 CT 值：本研究表明，咬合平面角度偶尔不会影响牙科种植体或氧化锆上部结构造成的金属伪影区域。其他结果表明，SEMAR 能有效减少金属伪影，从而准确评估种植体周围的牙槽骨。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Oral Radiology DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

4.20

自引率

13.60%

发文量

审稿时长

>12 weeks

期刊介绍： As the official English-language journal of the Japanese Society for Oral and Maxillofacial Radiology and the Asian Academy of Oral and Maxillofacial Radiology, Oral Radiology is intended to be a forum for international collaboration in head and neck diagnostic imaging and all related fields. Oral Radiology features cutting-edge research papers, review articles, case reports, and technical notes from both the clinical and experimental fields. As membership in the Society is not a prerequisite, contributions are welcome from researchers and clinicians worldwide.