Evaluation of the Metal Artifact Caused by Dental Implants in Cone Beam Computed Tomography Images

Vahdani, Nazmehr; Moudi, Ehsan; Ghobadi, Fatemeh; Mohammadi, Ebrahim; Bijani, Ali; Haghanifar, Sina

doi:10.26574/maedica.2020.15.2.224

Maedica

2020

DOI: 10.26574/maedica.2020.15.2.224

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Evaluation of the Metal Artifact Caused by Dental Implants in Cone Beam Computed Tomography Images

Nazmehr Vahdani

Ehsan Moudi²,

Fatemeh Ghobadi

et al.

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Cited by 2 publications

References 16 publications

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Quantitative assessment of image artifacts from zygoma implants on CBCT scans using different exposure parameters

Orhan,

Kocyigit,

Firincioglulari

et al. 2023

Proc Inst Mech Eng H

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This study was aimed at quantifying artifacts from zygoma implants in cone-beam computed tomography (CBCT) images using different exposure parameters. Two cadaver heads, one with two zygoma implants on each side and the other for control, were scanned using 18 different exposure parameters. Quantitative analysis was performed to evaluate the hypodense and hyperdense artifact percentages calculated as the percentage of the area. Hyperdense artifacts and hypodense artifacts were detected, followed by the calculation of the hyperdense and hypodense artifact percentages in the image. In the qualitative analysis of the artifacts, the scores used were as follows: absence (0), moderate presence (1), or high presence (2) for hypodense halos, thin hypodense lines, and hyperdense lines. Artifact analysis was performed qualitatively and quantitatively using the post-hoc Tukey and Two-way ANOVA tests. As a result, in the qualitative analyses, zygoma implants showed a significant difference compared to the control group with regard to hyperdense and hypodense artifacts ( p < 0.05). There was a significant difference between the means according to the FOV size arithmetic averages ( p < 0.05). In terms of voxel size, the difference was found to be significant, where 400 microns showed the highest hypodense artifact while 200 microns showed the lowest hypodense artifact. In conclusion, hypodense and hyperdense artifacts were significantly higher in cadavers with zygoma implants than in controls. As FOV and voxel size increase, more hypodense artifacts are produced by zygoma implants so smaller FOV and voxel sizes should be used to prevent poor image quality of adjacent teeth.

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Quantitative assessment of image artifacts from zygoma implants on CBCT scans using different exposure parameters

Orhan,

Kocyigit,

Firincioglulari

et al. 2023

Proc Inst Mech Eng H

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The effects of anatomical location and distance from dental implants on the quality and quantity of metal artifacts in cone beam computed tomography scans: a cross-sectional study

Salari,

Sakhdari,

Hafezi

et al. 2024

Egypt J Radiol Nucl Med

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Background Artifacts in cone beam computed tomography (CBCT) images can cause disruptions in diagnosis and treatment. Multiple factors influence the artifacts, including the quality and technology of devices, positions, patient-related factors, device settings, and bone density. Besides, anatomical area and distance from the implant affect the artifacts. This study aimed to investigate the effects of anatomical location and distance from the implant on the quality and quantity of artifacts. Methods A total of 200 CBCT images of patients with titanium implants and prostheses in the anterior and posterior regions of the maxilla and mandible were evaluated in this study. Four areas were assessed for each implant in three apical, middle, and cervical regions with distances of 3 mm, 4 mm, and 5 mm from the implant. Besides, the impact of adjacent implants on the artifacts was investigated. An ANOVA test with post hoc Bonferroni correction was used to analyze variable differences between subgroups. Results The differences were statistically significant, except for the difference between the posterior areas of the upper and lower jaws. A comparison of different areas revealed that most artifacts were related to the anterior maxilla, followed by anterior mandibular regions. The results of covariance analysis indicated that region and location had independent effects on the amount of artifacts. Conclusions Artifacts are more frequent in the anterior region compared to the posterior site. They are also more frequent in the maxilla than the mandible and cervical areas close to the implant than the middle and apical regions.

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Evaluation of the Metal Artifact Caused by Dental Implants in Cone Beam Computed Tomography Images

Cited by 2 publications

References 16 publications

Quantitative assessment of image artifacts from zygoma implants on CBCT scans using different exposure parameters

Quantitative assessment of image artifacts from zygoma implants on CBCT scans using different exposure parameters

The effects of anatomical location and distance from dental implants on the quality and quantity of metal artifacts in cone beam computed tomography scans: a cross-sectional study

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