Artifacts in orthodontic bracket systems in cone-beam computed tomography and multislice computed tomography

Journal of Orofacial Orthopedics = Fortschritte Der Kieferorthopädie : Organ/official Journal Deutsche Gesellschaft Für Kieferorthopädie
V HirschingerE Hofmann

Abstract

The purpose of this study was to quantify artifacts caused by different bracket systems in cone-beam computed tomography (CBCT) and multislice computed tomography (MSCT) scans. Orthodontic brackets of four different systems were consecutively bonded to the surface of a residual molar on a human cadaveric mandible. One MSCT system and three CBCT units were used to scan each of the four bonded brackets, in addition to obtaining a blank reference scan of the tooth surface. All datasets were registered to the reference dataset using visualization software (Analyze 11.0® by AnalyzeDirect). Artifact-related reductions in image quality were expressed in percent of theoretical maximum standard deviations (SD) obtained for the gray values of the adjacent voxels, with higher percentages correlating more pronounced artifacts. Both the SD percentages for three defined line profiles and their mean values were almost invariably higher with the MSCT system than with the CBCT units. Looking into the individual SD percentages, two of the CBCT units (Pax Zenith 3D® and Picasso Trio®; both Vatech) produced higher values than the MSCT system (SOMATOM Definition AS+®; Siemens) in some line profiles. The titanium bracket, in particular, was associat...Continue Reading

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Citations

Jun 5, 2020·Clinical Oral Investigations·F BaanE M Ongkosuwito
Sep 5, 2019·Dentistry Journal·Ahmad Abdelkarim
Oct 10, 2020·Seminars in Musculoskeletal Radiology·Victor Aquino WanderleyReinhilde Jacobs
Jan 8, 2021·Maxillofacial Plastic and Reconstructive Surgery·Katrin WillingerClemens Klug
Jun 3, 2021·Journal of Personalized Medicine·Bingjiang QiuPeter M A van Ooijen

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