title: [Influences of three types of dental ceramic alloys on magnetic resonance imaging].
abstract: 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.
authors.affiliation: Department of Stomatology, PUMC Hospital, CAMS and PUMC, Beijing 100730, China. wwdent@sina.com
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Bo
authors.initials: B
authors.lastname: Jiang
authors.forename: Xuan
authors.initials: X
authors.lastname: Wu
authors.forename: Jian-Jun
authors.initials: JJ
authors.lastname: Sun
mesh_terms: D000328:Adult; D016477:Artifacts; D002858:Chromium Alloys; D003830:Denture, Partial, Fixed; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D016876:Metal Ceramic Alloys
chemical_list: D002858:Chromium Alloys; D016876:Metal Ceramic Alloys