CAJ | 학술논문

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。
목적：탐토량충구강수복용저귀금속합금대자공진성상적영향。방법제취우하제이전마아전관예비체적초경석고모형，사용은파합금、금파합금、고락합금、양화고분별제작고자관급전자관，매충8개양본，우체외실험모형중진행자공진성상검측，대산생적금속위영진행측량，SPSS 16．0통계연건진행분석。결과4충재료재GRE서렬중도형성명현위영，관결구균기본불능분변。 SE、TSE서렬중，고락합금형성위영면적교은파、금파합금、양화고조대，차차이구유통계학의의。은파합금여금파합금위영면적차이무통계학의의。결론행MRI검사시，은파합금화금파합금재SE、TSE서렬중형성적위영면적경미，치득림상추천。
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 .Porcelain-fused-to-metal ( PFM) crown and ceramic crown were made from silver-palladium (Ag-Pd),gold-palladium (Au-Pd),cobalt-chrome (Co-Cr)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 Co-Cr PFM crown was larger than that in Ag-Pd and Au-Pd PFM crowns ,and the difference was statistically significant .Besides ,the difference of artifact areas between Ag-Pd and Au-Pd PFM crowns demonstrated no statistical significance .Conclusions There are no conspicuous MRI artifacts of Ag-Pd and Au-Pd PFM crowns in SE and TSE sequences ,which is preferable in clinic .