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

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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.

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Authors and Affiliations

  1. Graduate School of Dentistry, Department of Diagnostic Imaging, Kanagawa Dental University, Yokosuka City, Japan

    Ryoji Kitami, Masahiro Izumi, Motoe Taniguchi & Takashi Sakurai

  2. Graduate School of Dentistry, Department of Educational Planning, Kanagawa Dental University, Yokosuka City, Japan

    Yusuke Kozai

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  1. Ryoji Kitami
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  2. Masahiro Izumi
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  3. Motoe Taniguchi
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  4. Yusuke Kozai
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  5. Takashi Sakurai
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Correspondence to Masahiro Izumi.

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This article does not contain any studies with human or animal subjects performed by the any of the authors.

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This manuscript has not been published or presented elsewhere in part or in its entirety, and is not under consideration by another journal. There is no misconduct such as plagiarism or fabrication in this research. This research does not involve human participants and/or alive animals and is not subject to ethical review at our university.

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Kitami, R., Izumi, M., Taniguchi, M. et al. Phantom study for CT artifacts of dental titanium implants and zirconia upper structures: the effects of occlusal plane angle setting and SEMAR algorithm. Oral Radiol 40, 251–258 (2024). https://doi.org/10.1007/s11282-023-00730-6

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  • DOI: https://doi.org/10.1007/s11282-023-00730-6

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