Document Type : Original Article
Authors
1
Master’s degree student, Department of Oral Diagnosis and Radiology, Faculty of Dentistry, Mansoura University, Egypt
2
Professor of Oral and Maxillofacial Radiology, Faculty of Dentistry, Cairo University, Egypt
3
Lecturer of Oral Diagnosis and Radiology, Faculty of Dentistry, Mansoura University, Egypt
Abstract
Objective: This study aimed to evaluate the effect of variant milliampere setting on appearance of metal artifacts in Cone Beam Computed Tomography.
Methods: A dry human mandible with three titanium implants in anterior, premolar, and molar areas was scanned by CRANEX 3Dx CBCT unit utilizing variant mA setting, then, gray values were derived to detect metal artifacts in two different trials.
Results: In our study, both trials (trial I, trial II) showed insignificant difference as P-value > 0.05, gray values in different areas of the jaw (anterior, premolar, molar areas) showed that the amount of metal artifacts was generally insignificantly different when varying mA setting except few conditions, and there was significant difference between anterior area and posterior area (premolar, molar).
Conclusions: Our results revealed that metal artifacts exist constantly around dental implant in CBCT images and the anatomical region determine the amount of artifacts, which increased anteriorly more than posteriorly. Our findings revealed that there’s no obvious difference by increasing mA setting, however, from interpretation of gray values, S2 exposure setting (8mA, 90 kVp and 2.3s with 6x8cm field of view) in anterior area, H4 exposure setting (10mA, 90 kVp and 6.1s with 6x8cm field of view) in premolar and molar areas have the least mean gray value, and thereafter less amount of metal artifacts.
Keywords
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