不同材料固定局部义齿患者行头颈部MRI检查的成像效果和安全性比较

发布时间：2018-03-02 03:19

本文关键词： 固定局部义齿磁共振成像伪影材料安全性　出处：《吉林大学学报(医学版)》2017年06期 　论文类型：期刊论文

【摘要】：目的:采用不同材料制作固定局部义齿,并行头颈部磁共振成像(MRI)检查,探讨其对MRI的影响。方法:招募1例符合条件的志愿者,分别选择钴铬合金、金铂合金和二氧化锆作为内冠材料进行固定局部义齿修复。将3种不同内冠材料固定局部义齿就位于患者口内,进行2种序列(T1-TSE和T2-TSE)MRI扫描。以不戴有修复体的扫描图像作为对照,观察伪影的形状及图像信号的变化,检测3组不同材料义齿伪影累及层数,检测3种材料在冠状位、矢状位和轴位图像中伪影的最大直径,观察固定局部义齿的安全性。结果:各组修复体均产生伪影,其表现形式为信号的强弱变化和图像形状变化;伪影范围在所累及的中心层面最大,在矢状位、冠状位和轴位图像上有不同的表现形式。钴铬合金组义齿伪影累及层数明显多于金铂合金组和二氧化锆组,伪影均限于修复侧颌面部,未累及颈椎及颅脑部。钴铬合金组义齿累及或轻微累及所有邻近组织,金铂合金组和二氧化锆组义齿仅轻微累及下颌牙、舌肌及上颌牙冠。钴铬合金组义齿产生的伪影最大直径大于金铂合金组和二氧化锆组(P0.05)。修复体未见移位,患者无自觉不适。结论:口腔固定局部义齿在MRI检查时会产生伪影。金铂合金或二氧化锆内冠修复体可明显降低伪影的影响。口内妥善粘接的固定修复体对MRI检查患者不产生安全影响。
[Abstract]:Objective: to investigate the effect of fixed partial denture made from different materials on MRI by magnetic resonance imaging (MRI) of head and neck. Methods: one eligible volunteer was recruited to select cobalt-chromium alloy. Au-Pt alloy and zirconia were used as internal crown materials for fixed partial denture. Three different internal crown materials were used to fix partial denture in the patient's mouth. T1-TSE and T2-TSEE MRI scans were performed. The shape of artifacts and the changes of image signals were observed, and the number of layers involved in three groups of denture artifacts were detected, and the coronal position of three kinds of materials were detected. The maximum diameter of artifact in sagittal and axial images and the safety of fixed partial denture were observed. The range of artifacts was the largest at the central level involved, and had different manifestations in sagittal, coronal and axial images. The number of layers involved in denture artifacts in cobalt-chromium alloy group was significantly higher than that in gold platinum alloy group and zirconia group. Artifact was limited to the restoration of lateral maxillofacial region without cervical vertebrae or craniocerebral involvement. Cobalt chromium alloy dentures involved or slightly affected all adjacent tissues, while gold platinum alloy and zirconia dentures only slightly affected mandibular teeth. Tongue muscles and maxillary crowns. The maximum artifact diameter of the cobalt-chromium alloy denture was larger than that of the gold-platinum alloy group and the zirconia group P0.05.The prosthesis was not displaced. Conclusion: artifact will occur during MRI examination. Gold platinum alloy or zirconia internal crown prosthesis can obviously reduce the effect of artifact. The properly bonded fixed prosthesis in oral cavity can be used for MRI examination. No safety effects were observed.
【作者单位】：吉林大学口腔医院修复科;江苏省镇江市口腔医院修复科;
【基金】：吉林省科技厅重点科技攻关计划项目资助课题(20150204004YY) 江苏省镇江市科技局社会发展项目资助课题(SH2015051) 吉林省长春市“双十工程”重大科技攻关计划项目资助课题(16ss12) 吉林大学研究生创新基金项目资助课题(2017134)
【分类号】：R783.6

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