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Dental materials and magnetic resonance imaging.
M Lissac1, D Metrop, J Brugirard
1Faculté d'Odontologie, Lyon, France.
Investigative Radiology
|January 1, 1991
Summary
Dental prostheses can distort MRI scans. Nonprecious alloys cause significant image artifacts, while precious alloys do not, impacting facial and jaw imaging.
Area of Science:
- Radiology
- Materials Science
Background:
- Dental prostheses are common in patients undergoing MRI.
- Fixed dental prostheses can cause magnetic resonance imaging (MRI) artifacts, potentially distorting facial and jaw scans.
Purpose of the Study:
- To evaluate the in vitro and in vivo MRI characteristics of various dental prosthetic materials.
- To identify which dental materials cause significant image distortion and in which anatomical regions.
Main Methods:
- In vitro assessment of MRI appearances for precious alloys, nonprecious alloys, ceramic, amalgam, and composite materials.
- In vivo placement of these materials in patients' mouths for MRI scanning.
- Analysis of image deformation and affected anatomical zones.
Main Results:
- Nonprecious alloys produced substantial MRI image deformations.
- Precious alloys demonstrated no significant effect on MRI image quality.
- The extent of image distortion from nonprecious alloys correlated with prosthesis volume and MRI sequence.
Conclusions:
- Nonprecious dental alloys are a significant source of MRI artifacts in head and neck imaging.
- Precious alloys are generally safe for MRI compatibility.
- Understanding material-specific artifact generation is crucial for accurate MRI interpretation in patients with dental work.