Evaluation of magnetic resonance imaging issues of titanium and stainless steel brackets

Linetskiy, Igor; Starčcuková, Jana; Hubálková, Hana; Starčcuk, Zenon; Özcan, Mutlu

doi:10.2306/scienceasia1513-1874.2019.45.145

Cited by 3 publications

(3 citation statements)

References 41 publications

(76 reference statements)

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“…In the literature, some studies determined a minimal increase in the temperature (i.e., < 1 °C) of stainless steel (SS) and nickel-titanium (NiTi) brackets and wires during 3 T as well as 1.5 T MRI exposures [ 9 , 10 ]. Hasegawa et al used fixed brackets and wires to determine the temperature elevation at 3 T MRI.…”

Section: Resultsmentioning

confidence: 99%

MRI compatibility of orthodontic brackets and wires: systematic review article

Dobai

Dembrovszky

Vízkelety³

et al. 2022

BMC Oral Health

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Background Before the magnetic resonance imaging (MRI) examination fixed orthodontic devices, such as brackets and wires, cause challenges not only for the orthodontist but also for the radiologist. Essentially, the MRI-safe scan of the fixed orthodontic tools requires a proper guideline in clinical practice. Therefore, this systematic review aimed to examine all aspects of MRI-safe scan, including artifact, thermal, and debonding effects, to identify any existing gaps in knowledge in this regard and develop an evidence-based protocol. Methods The Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) statement was used in this study. The clinical question in “PIO” format was: “Does MRI examination influence the temperature of the orthodontic devices, the size of artifacts, and the debonding force in patients who have fixed orthodontic bracket and/or wire?” The search process was carried out in PubMed, PubMed Central, Scopus, and Google Scholar databases. The search resulted in 1310 articles. After selection according to the eligibility criteria, 18 studies were analyzed by two reviewers. The risk of bias was determined using the Quality In Prognosis Studies tool. Results Out of the eligible 18 studies, 10 articles examined the heating effect, 6 were about the debonding effect, and 11 measured the size of artifact regarding brackets and wires. Considering the quality assessment, the overall levels of evidence were high and medium. The published studies showed that heating and debonding effects during MRI exposure were not hazardous for patients. As some wires revealed higher temperature changes, it is suggested to remove the wire or insert a spacer between the appliances and the oral mucosa. Based on the material, ceramic and plastic brackets caused no relevant artifact and were MRI-safe. Stainless steel brackets and wires resulted in susceptibility artifacts in the orofacial region and could cause distortion in the frontal lobe, orbits, and pituitary gland. The retainer wires showed no relevant artifact. Conclusions In conclusion, the thermal and debonding effects of the fixed orthodontic brackets and wires were irrelevant or resoluble; however, the size of the artifacts was clinically relevant and determined most significantly the feasibility of fixed brackets and wires in MRI examination.

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Section: Resultsmentioning

confidence: 99%

MRI compatibility of orthodontic brackets and wires: systematic review article

Dobai

Dembrovszky

Vízkelety³

et al. 2022

BMC Oral Health

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“…When the size of the materials and device is reduced to nanometer scale, many novel quantum phenomena will appear, which will bring many new and important applications [1][2][3]. A typical case is the quantum conductance behavior of the atomically thin metal junction, which has been verified with a large number of theoretical and experimental studies in the past decades [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Study of the surface structure of Fe quantum wire prepared by electrochemical method in solution

Yu¹,

Xia²,

Dong³

2020

ScienceAsia

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The surface structural characteristics of Fe quantum wires prepared by two electrochemical methods in solution were studied by their conductance changes caused by the interactions between the quantum wires and specific molecules. Once ascorbic acid was added into the solution, the conductance of the Fe junction decreased to a lower value while for the dopamine adsorption, the conductance showed no obvious change. We proposed that there were some iron(II) ions on the surface of atomic-scale Fe junction, not iron(III) ions, and these iron(II) ions played a significant role for the conductance change. This mechanism was further enhanced by the following two experiments. When exposing the quantum wire to sodium borohydride, the conductance increased to a higher value, and the conductance increase was also observed with an electrochemical reduction process, which provided additional evidence for the proposed mechanism.

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“…This is because a systematic error runs through the relevant literature: often only individual products are examined as representative of the entire product range. Therefore the authors generalize that steel products should be generally removed for artifact-free diagnostics [ 2 , 5 , 8 , 17 , 18 , 21 , 25 ]. This coincides with the everyday experience at the MRI, where brackets made of magnetizable steel grades can erase the entire visceral cranium or even render the entire imaging system unusable, depending on the artifact susceptibility of the MRI sequence.…”

Section: Introductionmentioning

confidence: 99%

Die intraorale Permeabilitätsmessung als Screening der Artefaktbildung durch orthodontische Produkte in der MRT

et al. 2021

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Aim Metal dental products lack precautionary statements regarding MR compatibility due to an exemption in the labelling obligation. Hence, it is difficult for radiologists to decide whether to remove fixed metal objects in patients prior to MRI. A solution could be the direct determination of the magnetic permeability (µr) as a decisive material-related predictor of artifact formation and other interactions. Thus, the applicability of an industrially used measurement device as a screening instrument and the relevance of the manufacturer’s application restrictions in vitro and in vivo were tested. Methods Precision and trueness were tested using self-made test objects with different dimensions and different permeability. To clarify whether the measurement results are affected by the remanence (BR) induced in the objects, 28 brackets of different materials were exposed to a weak and a strong external magnetic field and the magnetic flux density before and after these exposures was compared. The clinical test was performed on a volunteer with an orthodontic appliance experimentally composed of brackets with different levels of magnetic permeability (µr). Validity and intra- and interrater reliability were calculated using two rater groups consisting of four dentists and four medical-technical radiology assistants (MTRA), respectively. Results With coefficients of variation below 0.14%, precision was excellent regardless of object surface and size. Trueness was high on objects with µr ≤ 1.002, and decreased with increasing µr, for which size-dependent correction factors were calculated. Intra- and interrater reliability and validity were excellent and independent of professional intraoral manipulation experience. Conclusions The permeability measurement allows for a valid and reliable determination of the magnetizability of intraoral metal objects. When used as a screening tool to detect nonartifact-causing objects, no correction factor needs to be calculated. For the first time, it offers radiologists a decision support for the selective removal of only the highly permeable components of the multiband apparatus.

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Evaluation of magnetic resonance imaging issues of titanium and stainless steel brackets

Cited by 3 publications

References 41 publications

MRI compatibility of orthodontic brackets and wires: systematic review article

MRI compatibility of orthodontic brackets and wires: systematic review article

Study of the surface structure of Fe quantum wire prepared by electrochemical method in solution

Die intraorale Permeabilitätsmessung als Screening der Artefaktbildung durch orthodontische Produkte in der MRT

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