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Radiology, Vol 166, 777-779, Copyright © 1988 by Radiological Society of North America

ARTICLES

Dental material artifacts on MR images

DB Hinshaw Jr, BA Holshouser, HI Engstrom, AH Tjan, EL Christiansen and WF Catelli
Department of Radiation Sciences, Loma Linda University, Calif.

Magnetic resonance (MR) imaging of the head and neck is becoming an important aid in evaluating pathologic conditions of the brain, midface, and pharynx. Certain dental materials cause artifacts during MR imaging of the lower midface. These artifacts can obscure the normal anatomy. This study describes the degree of artifact production caused by various materials commonly used in dental restorations. Of the materials tested, those causing artifacts were made of stainless steel, such as orthodontic bands used for braces, and pins or posts that are commonly drilled into teeth to provide structure or stability before filling. Materials used as temporary or permanent fillings or crowns-- such as amalgam, gold alloy, aluminum, microfilled resin, and polyvinyl acrylics--did not cause artifacts in the images.


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