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Updated: May 14, 2026
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Protocol for the Evaluation of MRI Artifacts Caused by Metal Implants to Assess the Suitability of Implants and the Vulnerability of Pulse Sequences
Published on: May 17, 2018
Metal artifacts from posterior mandibular implants as seen in CBCT.
Munetaka Naitoh1, Kiyonobu Saburi, Kenichi Gotoh
1Department of Oral and Maxillofacial Radiology, School of Dentistry, Aichi-Gakuin University, Nagoya, Japan. mune@dpc.aichi-gakuin.ac.jp
Implant Dentistry
|February 13, 2013
Summary
Cone-beam computed tomography (CBCT) clearly shows mesiodistal metal artifacts around dental implants in the jaw. These artifacts were not significantly different in rotational panoramic radiography, unlike in CBCT imaging.
Area of Science:
- Dental radiology
- Medical imaging
- Biomaterials
Background:
- Metal artifacts in Cone-Beam Computed Tomography (CBCT) from dental implants require further clarification.
- Previous studies have not fully elucidated the nature and extent of these artifacts.
Purpose of the Study:
- To assess mesiodistal metal artifacts originating from dental implants in the posterior mandibular region using CBCT.
- To compare artifact presence and characteristics between CBCT and rotational panoramic radiography.
Main Methods:
- Pixel values surrounding 61 dental implants in 22 patients were measured using CBCT and rotational panoramic radiography.
- Mean pixel values were calculated for regions adjacent to, between, and posterior to dental implants.
Main Results:
- CBCT demonstrated significantly lower mean pixel values between, adjacent to, and posterior to dental implants compared to interdental spaces.
- Rotational panoramic radiography showed no significant difference in mean pixel values between dental implants and neighboring teeth.
Conclusions:
- Mesiodistal metal artifacts surrounding dental implants are demonstrably present in CBCT images.
- CBCT imaging is effective in visualizing metal artifacts from dental implants in the posterior mandible.
