Ferromagnetic/paramagnetic orthodontic wires may create artefacts during MRI due to local alteration of magnetic field homogeneity: Study

Results: With SE/GRE, black/white artefacts volumes from all SS wires were significantly larger than those produced by CC and Ti wires (P < .01). With the GRE, the black artefacts volume was the highest with the SS wires. With the SE, the black artefacts volume was small, whereas white artefacts were noticeable. The cranio-caudal extent of the artefacts was significantly longer with SS wires (P < .01). Although a direct relationship of wire length, number of wires, and wire thickness with artefact volume was noted, these factors did not influence artefact extension in the cranio-caudal direction. Ferromagnetic/paramagnetic orthodontic wires create artefacts due to local alteration of magnetic field homogeneity. The SS-type wires produced the largest artefacts followed by CC and Ti.

Reference:

Yuri Iwamoto, Hiroaki Shimamoto, Doaa Felemban, Tomoyuki Terai, Sven Kreiborg, Sanjay M Mallya, Fan-pei Gloria Yang, Chihiro Tanikawa, Shumei Murakami, MRI susceptibility artefacts caused by orthodontic wire, Dentomaxillofacial Radiology, 2024;, twae023, https://doi.org/10.1093/dmfr/twae023