MRI Artifacts of Four Commonly Used Dental Metal Materials: A Comparative Study

doi:10.13701/j.cnki.kqyxyj.2016.08.009

Abstract

Abstract: Objective: To compare the MRI artifacts of four different dental metal materials, providing clinical evidence for prosthodontic doctors. Methods: Full crowns of Co-Cr alloy, pure titanium, silver palladium, and gold palladium were made according to a standard model.Full crown of zirconium dioxide was taken as control. All crowns were embedded in a 13cm × 25cm×10 cm (length x width x height) plastic container filled with distilled water.Artifacts were compared on the T2-weighted images in 1.5 T spin echo sequences. Results: Different materials showed different artifacts in the same spin echo sequence.Artifacts of Co-Cr alloy, pure titanium, silver palladium crownswere (450±665), (343±322), (141±141) respectively. There were significant differences between them (P<0.05). There was no significant difference between gold palladium group and zirconium dioxide group. Conclusion: MRI artifacts of the four materials in descending order were as follows: Co-Cr＞pure titanium＞silver palladium＞gold palladium.

Key words: Oral materials, Metal, Artifacts, MRI

CLC Number:

R783.1

Si Qin-gaowa, Dilinuer·AJi, Wang Xing,Liao Bo, Qi Lu,Paziliya·Tu Da-hong,Bishala·Ye Er-nuer. MRI Artifacts of Four Commonly Used Dental Metal Materials: A Comparative Study[J]. Journal of Oral Science Research, 2016, 32(8): 812-815.

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