Effect of Different Head Positions on Metal Artifacts in Cone Beam Computed Tomography
Document Type : Original Article
Author
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 the CBCT imaging, metal artifact resulting from metallic materials in oral cavity, still has a negative effect on image quality and diagnostic process. Therefore, this study aimed to assess the effect of head position on reduction of metal artifacts.
Material & Methods : This cross-sectional-analytical study was conducted in Faculty of Dentistry of Isfahan Univercity of Medical Sciences in 2017 on 6 dry edentulous human mandibles. Mandibular premolars and first molars with amalgam filling were fixed in their sockets then each mandible was scanned by CBCT at 5 positions: standard, rotation, tilt, extension, flexion. 6 variables (D1-D6) were measured by two observers. Data was analyzed with one-way repeated measure ANOVA and paired T tests at a significance level of P< 0.05.
Results : Data analysis showed that there is a significant difference only in 4 variables (D1-D4) at both sides of the mandible (P-value< 0.05). Also a significant difference was seen between tilt and standard position at contralateral side and flexion, extension and standard position in restoration side (P-value< 0.05).
Conclusion : The head position is effective on metal artifacts in CBCT images and the maximum reduction, in tilt position at contralateral side of the metallic materials was reported.
Material & Methods : This cross-sectional-analytical study was conducted in Faculty of Dentistry of Isfahan Univercity of Medical Sciences in 2017 on 6 dry edentulous human mandibles. Mandibular premolars and first molars with amalgam filling were fixed in their sockets then each mandible was scanned by CBCT at 5 positions: standard, rotation, tilt, extension, flexion. 6 variables (D1-D6) were measured by two observers. Data was analyzed with one-way repeated measure ANOVA and paired T tests at a significance level of P< 0.05.
Results : Data analysis showed that there is a significant difference only in 4 variables (D1-D4) at both sides of the mandible (P-value< 0.05). Also a significant difference was seen between tilt and standard position at contralateral side and flexion, extension and standard position in restoration side (P-value< 0.05).
Conclusion : The head position is effective on metal artifacts in CBCT images and the maximum reduction, in tilt position at contralateral side of the metallic materials was reported.
Keywords
)