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Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie

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20.04.2016 | Original Article

MRI vs. CT for orthodontic applications: comparison of two MRI protocols and three CT (multislice, cone-beam, industrial) technologies

Erschienen in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie | Ausgabe 4/2016

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Abstract

Objectives

To examine the relative usefulness and suitability of magnetic resonance imaging (MRI) in daily clinical practice as compared to various technologies of computed tomography (CT) in addressing questions of orthodontic interest.

Methods

Three blinded raters evaluated 2D slices and 3D reconstructions created from scans of two pig heads. Five imaging modalities were used, including three CT technologies—multislice (MSCT), cone-beam CT (CBCT), and industrial (µCT)—and two MRI protocols with different scan durations. Defined orthodontic parameters were rated one by one on the 2D slices and the 3D reconstructions, followed by final overall ratings for each modality. A mixed linear model was used for statistical analysis.

Results

Based on the 2D slices, the parameter of visualizing tooth-germ topography did not yield any significantly different ratings for MRI versus any of the CT scans. While some ratings for the other parameters did involve significant differences, how these should be interpreted depends greatly on the relevance of each parameter. Based on the 3D reconstructions, the only significant difference between technologies was noted for the parameter of visualizing root-surface morphology. Based on the final overall ratings, the imaging performance of the standard MRI protocol was noninferior to the performance of the three CT technologies.

Conclusions

On comparing the imaging performance of MRI and CT scans, it becomes clear that MRI has a huge potential for applications in daily clinical practice. Given its additional benefits of a good contrast ratio and complete absence of ionizing radiation, further studies are needed to explore this clinical potential in greater detail.

More specifically, the IIS "Project Group NanoCT Systems" (Würzburg, Germany) and the IIS "Application Center for Computed Tomography Measurement Technology" (Deggendorf, Germany).

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Titel: MRI vs. CT for orthodontic applications: comparison of two MRI protocols and three CT (multislice, cone-beam, industrial) technologies
Publikationsdatum: 20.04.2016
Erschienen in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie / Ausgabe 4/2016
Print ISSN: 1434-5293
Elektronische ISSN: 1615-6714
DOI: https://doi.org/10.1007/s00056-016-0028-2

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MRI vs. CT for orthodontic applications: comparison of two MRI protocols and three CT (multislice, cone-beam, industrial) technologies

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Objectives

Methods

Results

Conclusions

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Results

Conclusions

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