2种低贵金属合金在MRI影像中伪影的评价

›› 2015, Vol. 35 ›› Issue (11): 924-927.

2种低贵金属合金在MRI影像中伪影的评价

苏葵¹,萧学红²,方铁钧³,狄丽莎⁴

1. 广东省中山市人民医院口腔分院
2. 中山市人民医院核磁共振室
3. 中山市人民医院口腔分院修复科
4. 中山市人民医院

收稿日期:2014-09-10 修回日期:2015-01-26 出版日期:2015-11-28 发布日期:2015-11-28
通讯作者: 苏葵 E-mail:491781534@qq.com

Assessment on MRI artifacts of two low noble metal alloys

Received:2014-09-10 Revised:2015-01-26 Online:2015-11-28 Published:2015-11-28

摘要/Abstract

摘要： ［摘要］目的探讨两种口腔修复用低贵金属合金对磁共振成像的影响。方法制取右下第二前磨牙全冠预备体的超硬石膏模型，使用银钯合金、金钯合金、钴铬合金、氧化锆分别制作烤瓷冠及全瓷冠，每种8个样本，于体外实验模型中进行磁共振成像检测，对产生的金属伪影进行测量，SPSS 16.0统计软件进行分析。结果 4种材料在GRE序列中都形成明显伪影，冠结构均基本不能分辨。SE、TSE序列中，钴铬合金形成伪影面积较银钯、金钯合金、氧化锆组大，且差异具有统计学意义。银钯合金与金钯合金伪影面积差异无统计学意义。结论行MRI检查时，银钯合金和金钯合金在SE、TSE序列中形成的伪影面积轻微，值得临床推荐。

关键词: [关键词]磁共振成像, 伪影, 贵金属

Abstract: Abstract: Objective To study the influence of two low noble metal alloys for dental restorations on MRI.Methods Anhydrite model for full crown preparation of low right second premolar was prepared.Porcelainfusedtometal （PFM）crown and ceramic crown were made from silverpalladium （AgPd）,goldpalladium （AuPd）,cobaltchrome （CoCr）and zirconia,with 8 samples for each type.The samples were subjected to magnetic resonance imaging （MRI）examination.The areas of MRI artifacts were measured and then analyzed with SPSS16.0 Statistic Software.Results Conspicuous artifacts were found in all the materials in GRE sequence,and crown structures could hardly be discriminated.In SE and TSE sequences,the artifact area in CoCr PFM crown was larger than that in AgPd and AuPd PFM crowns,and the difference was statistically significant.Besides,the difference of artifact areas between AgPd and AuPd PFM crowns demonstrated no statistical significance.Conclusions There are no conspicuous MRI artifacts of AgPd and AuPd PFM crowns in SE and TSE sequences,which is preferable in clinic.

Key words: [key words] magnetic resonance imaging, artifact, noble metal

中图分类号:

R783.1

苏葵萧学红方铁钧狄丽莎. 2种低贵金属合金在MRI影像中伪影的评价[J]. , 2015, 35(11): 924-927.

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