4种瓷熔附金属修复体对磁共振成像伪影的初步研究  

Artifacts from four alloys of porcelain-fused-to-metal crown in magnetic resonance imaging

作　　者：苏葵[1] 萧学红 方铁钧[1] 狄丽莎[1] 

机构地区：[1]中山市人民医院口腔分院特诊科,广东中山528400 [2]中山市人民医院磁共振室,广东中山528400

出　　处：《临床口腔医学杂志》2014年第11期648-651,共4页Journal of Clinical Stomatology

基　　金：广东省中山市科技计划项目(20113A108)

摘　　要：目的:研究4种瓷熔附金属修复体磁共振成像伪影的影响。方法:制取右下第二前磨牙全冠预备体的超硬石膏模型,使用镍铬合金、钴铬合金、银钯合金、金合金分别制作4类烤瓷冠实验样本,每类型合金3个样本,于体外进行磁共振检测,对产生的伪影进行测量,SPSS 16.0统计软件进行分析。结果:梯度回波(GRE)序列形成伪影范围最大,自旋回波(SE)序列次之,快速自旋回波(TSE)序列最小。伪影范围从大到小依次为镍铬、钴铬、银钯、金合金。TSE序列中镍铬、钴铬、银钯合金冠边缘局部可见高信号环带,金合金冠边缘光滑,无变形。结论:镍铬、钴铬合金MRI伪影范围较大,选用贵金属修复及TSE序列修复可最大限度地减少MRI伪影形成。Objective：To evaluate the range of artifacts generated by four metal alloys. Method：Get the preparation anhydrite model of low right second premolar.Porcelain-fused-to-metal （PFM） crown were made from Nickel-chrome （Ni-Cr）,Cobalt-chrome （Co-Cr）,Silver-palladium （Ag-Pd）,gold alloys,3 samples for each one.The samples were subjected to magnetic resonance imaging （MRI） examination.The areas of MRI artifacts were measured and SPSS16.0 statistic software was employed for analysis. Result：The GRE sequences made the largest range of artifacts,lower in SE sequences,lowest in TSE sequences.The areas of artifacts is lower from Ni-Cr,Co-Cr to Ag-Pd follow to gold alloys.The border of PFM of Ni-Cr, Co-Cr and Ag-Pd were found a hyperintense girdle band,however no distortion in gold alloys. Conclusion：The areas of artifacts from Ni-Cr and Co-Cr alloys is conspicuous.Use noble metal restorations and TSE sequences can minimize the metal artifacts maximatily.

关 键 词：金属合金 磁共振成像 伪影 

分 类 号：R816.98[医药卫生—放射医学]