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Orthodontic appliances and MR image artefacts : An exploratory in vitro and in vivo study using 1.5-T and 3-T scanners

Sonesson, Mikael ; Al Qabandi, Fahad ; Månsson, Sven LU orcid ; Abdulraheem, Salem ; Bondemark, Lars LU and Hellén Halme, Kristina (2021) In Imaging Science in Dentistry 51.
Abstract

Purpose: The aim of this study was to assess the artefacts of 12 fixed orthodontic appliances in magnetic resonance images obtained using 1.5-T and 3-T scanners, and to evaluate different imaging sequences designed to suppress metal artefacts. Materials and Methods: In vitro, study casts of 1 adult with normal occlusion were used. Twelve orthodontic appliances were attached to the study casts and scanned. Turbo spin echo (TSE), TSE with high readout bandwidth, and TSE with view angle tilting and slice encoding for metal artefact correction were used to suppress metal artefacts. Artefacts were measured. In vivo, 6 appliances were scanned: 1) conventional stainless-steel brackets; 2) nickelfree brackets; 3) titanium brackets; 4) a Herbst... (More)

Purpose: The aim of this study was to assess the artefacts of 12 fixed orthodontic appliances in magnetic resonance images obtained using 1.5-T and 3-T scanners, and to evaluate different imaging sequences designed to suppress metal artefacts. Materials and Methods: In vitro, study casts of 1 adult with normal occlusion were used. Twelve orthodontic appliances were attached to the study casts and scanned. Turbo spin echo (TSE), TSE with high readout bandwidth, and TSE with view angle tilting and slice encoding for metal artefact correction were used to suppress metal artefacts. Artefacts were measured. In vivo, 6 appliances were scanned: 1) conventional stainless-steel brackets; 2) nickelfree brackets; 3) titanium brackets; 4) a Herbst appliance; 5) a fixed retainer; and 6) a rapid maxillary expander. The maxilla, mandible, nasopharynx, tongue, temporomandibular joints, and cranial base/eye globes were assessed. Scores of 0, 1, 2, and 3 indicated no artefacts and minor, moderate, and major artefacts, respectively. Results: In vitro, titanium brackets and the fixed retainer created minor artefacts. In vivo, titanium brackets caused minor artefacts. Conventional stainless-steel and nickel free brackets, the fixed retainer, and the rapid maxillary expander caused major artefacts in the maxilla and mandible. Conventional stainless-steel and nickel-free brackets caused major artefacts in the eye globe (3-T). TSE with high readout bandwidth reduced image artefacts in both scanners. Conclusion: Titanium brackets, the Herbst appliance, and the fixed retainer caused minor artefacts in images of neurocranial structures(1.5-T and 3-T) when using TSE with high readout bandwidth.(Imaging Sci Dent 20200199)

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Artifacts, Magnetic Resonance Imaging, Orthodontic Appliances, Skull
in
Imaging Science in Dentistry
volume
51
article number
e11
pages
13 pages
publisher
Korean Academy of Oral and Maxillofacial Radiology
external identifiers
  • pmid:33828963
  • scopus:85102127350
ISSN
2233-7822
DOI
10.5624/isd.20200199
language
English
LU publication?
yes
id
9144696a-ae23-4453-ba82-110c7da34206
date added to LUP
2021-03-18 10:13:40
date last changed
2024-05-30 08:10:26
@article{9144696a-ae23-4453-ba82-110c7da34206,
  abstract     = {{<p>Purpose: The aim of this study was to assess the artefacts of 12 fixed orthodontic appliances in magnetic resonance images obtained using 1.5-T and 3-T scanners, and to evaluate different imaging sequences designed to suppress metal artefacts. Materials and Methods: In vitro, study casts of 1 adult with normal occlusion were used. Twelve orthodontic appliances were attached to the study casts and scanned. Turbo spin echo (TSE), TSE with high readout bandwidth, and TSE with view angle tilting and slice encoding for metal artefact correction were used to suppress metal artefacts. Artefacts were measured. In vivo, 6 appliances were scanned: 1) conventional stainless-steel brackets; 2) nickelfree brackets; 3) titanium brackets; 4) a Herbst appliance; 5) a fixed retainer; and 6) a rapid maxillary expander. The maxilla, mandible, nasopharynx, tongue, temporomandibular joints, and cranial base/eye globes were assessed. Scores of 0, 1, 2, and 3 indicated no artefacts and minor, moderate, and major artefacts, respectively. Results: In vitro, titanium brackets and the fixed retainer created minor artefacts. In vivo, titanium brackets caused minor artefacts. Conventional stainless-steel and nickel free brackets, the fixed retainer, and the rapid maxillary expander caused major artefacts in the maxilla and mandible. Conventional stainless-steel and nickel-free brackets caused major artefacts in the eye globe (3-T). TSE with high readout bandwidth reduced image artefacts in both scanners. Conclusion: Titanium brackets, the Herbst appliance, and the fixed retainer caused minor artefacts in images of neurocranial structures(1.5-T and 3-T) when using TSE with high readout bandwidth.(Imaging Sci Dent 20200199)</p>}},
  author       = {{Sonesson, Mikael and Al Qabandi, Fahad and Månsson, Sven and Abdulraheem, Salem and Bondemark, Lars and Hellén Halme, Kristina}},
  issn         = {{2233-7822}},
  keywords     = {{Artifacts; Magnetic Resonance Imaging; Orthodontic Appliances; Skull}},
  language     = {{eng}},
  publisher    = {{Korean Academy of Oral and Maxillofacial Radiology}},
  series       = {{Imaging Science in Dentistry}},
  title        = {{Orthodontic appliances and MR image artefacts : An exploratory in vitro and in vivo study using 1.5-T and 3-T scanners}},
  url          = {{http://dx.doi.org/10.5624/isd.20200199}},
  doi          = {{10.5624/isd.20200199}},
  volume       = {{51}},
  year         = {{2021}},
}