Effect of Different Head Positions on Metal Artifacts in Cone Beam Computed Tomography
Document Type : Original Article
Authors
1 Department of Oral and Maxillofacial Radiology, Dental Implants Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
2 Department of Oral and Maxillofacial Radiology, Dental Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
10.48305/jids.2025.45289.1002
Abstract
Introduction : Despite the high diagnostic value of Cone Beam Computed Tomog (CBCT) imaging, metal artifacts caused by metallic materials in the oral cavity still negatively affect image quality and the diagnostic process. This study aimed to assess the effect of head position on the reduction of metal artifacts.
Material and Methods: This cross-sectional-analytical study was conducted at the Faculty of Dentistry of Isfahan University of Medical Sciences in 2018 on six dry edentulous human mandibles. Mandibular premolars and first molars with amalgam fillings were fixed in their sockets then each mandible was scanned by CBCT in five positions: standard, rotation, tilt, extension, flexion. Six variables (D1-D6) were measured by two observers. Data were analyzed using one-way repeated measures ANOVA and Paired T-tests at a significance level of P < 0.05.
Results: The analysis showed significant differences in four variables (D1-D4) on both sides of the mandible. Significant differences were also observed between the flexion, extension, and standard positions on the side with the restoration, and between the tilt and standard positions on the contralateral side.
Conclusion: Head position significantly affects metal artifacts in CBCT images, with the greatest artifact reduction observed in the tilt position on the side opposite the metallic restoration.
Material and Methods: This cross-sectional-analytical study was conducted at the Faculty of Dentistry of Isfahan University of Medical Sciences in 2018 on six dry edentulous human mandibles. Mandibular premolars and first molars with amalgam fillings were fixed in their sockets then each mandible was scanned by CBCT in five positions: standard, rotation, tilt, extension, flexion. Six variables (D1-D6) were measured by two observers. Data were analyzed using one-way repeated measures ANOVA and Paired T-tests at a significance level of P < 0.05.
Results: The analysis showed significant differences in four variables (D1-D4) on both sides of the mandible. Significant differences were also observed between the flexion, extension, and standard positions on the side with the restoration, and between the tilt and standard positions on the contralateral side.
Conclusion: Head position significantly affects metal artifacts in CBCT images, with the greatest artifact reduction observed in the tilt position on the side opposite the metallic restoration.
Highlights
Mahnaz Sheikhi: Google Scholar, PubMed
Shohreh Nekouie: Google Scholar, PubMed
Shima Saneiyan: Google Scholar, PubMed
Keywords
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