[Influences of three types of dental ceramic alloys on magnetic resonance imaging].
OBJECTIVE
To observe the influence of three types of dental ceramic alloys on magnetic resonance imaging (MRI).


METHODS
Ni-Cr alloy, Co-Cr alloy, and Ti alloy were elaborated into three crowns with the same shape and size by computer aided design, computer aided manufacturing device. Afterwards we fixed the crown in the mouth of a volunteer at the same location separately. Then we scanned them with MRI. The extents of artifacts were compared.


RESULTS
All these alloys caused MR artifacts. The extent of the artifact of Co-Cr alloy was larger than those of Ni-Cr alloy and Ti alloy under MRI.


CONCLUSIONS
Ti alloy has the smallest influence on MRI than Ni-Cr alloy and Co-Cr alloy.
Wang
Wei
W
Department of Stomatology, PUMC Hospital, CAMS and PUMC, Beijing 100730, China. wwdent@sina.com
Jiang
Bo
B
Wu
Xuan
X
Sun
Jian-Jun
JJ
D000328:Adult; D016477:Artifacts; D002858:Chromium Alloys; D003830:Denture, Partial, Fixed; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D016876:Metal Ceramic Alloys
D002858:Chromium Alloys; D016876:Metal Ceramic Alloys