Comparison of the artifacts on magnetic resonance imaging caused by different porcelain-fused-to-metals

doi:10.3969/j.issn.2095-4344.2014.12.013

Abstract

Abstract:

BACKGROUND: The patients with porcelain-fused-to-metal crowns who do examination of magnetic resonance imaging (MRI) can cause artifacts. In recent years, researching for MRI artifacts of different porcelain-fused-to-metal materials has been some progress, but there are less quantitatively reports on the MRI artifacts of different porcelain-fused-to-metal materials.
OBJECTIVE: To evaluate the artifact sizes shown on fast spin-echo T2-weighted sequence caused by different kinds of porcelain-fused-to-metal crowns.
METHODS: Forty-eight lower right first molar crown patients who had MRI examination in MRI room were enrolled. The patients were divided into nickel-chromium alloy group, cobalt-chromium alloy group and titanium crown group. All patients were examined with fast spin-echo T2-weighted sequences by means of 1.5 T MRI apparatus. MRI artifacts areas of same sequence on the MRI images of different porcelain-fused-to-metal materials were analyzed with variance test.
RESULTS AND CONCLUSION: Forty-five cases appearing to have high signal samples with clearly curved boundary zone that can be measured were selected, 15 cases for each material. Different artifact sizes were produced on the same sequence of different porcelain-fused-to-metal materials, which were (321.67±33.29) mm² in the nickel-chromium alloy group, (263.53±34.95) mm2 in the cobalt-chromium alloy group, and (143.67±31.13) mm2 in the titanium crown group. There were significant differences between groups (P < 0.05). The artifact size is smallest for the titanium crown and largest for the nickel-chromium alloy crown.

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

全文链接：

Key words: biocompatible materials, metal ceramic alloys, magnetic resonance imaging

CLC Number:

R318

Feng Juan, Li Wen-jin, Niu Jin-liang, Wang Hui-min, Yin Wen-jing. Comparison of the artifacts on magnetic resonance imaging caused by different porcelain-fused-to-metals [J]. Chinese Journal of Tissue Engineering Research, 2014, 18(12): 1883-1888.

Figures/Tables 1

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