四种常用口腔金属材料MRI伪影对比研究

发布时间：2018-05-14 19:16

本文选题：口腔材料 + 金属　；参考：《新疆医科大学》2017年硕士论文

【摘要】：目的:通过体外实验对比研究修复临床工作中四种常用不同口腔金属材料(钴铬、纯钛、银钯、金钯)在头颈部常用MRI检查序列中产生伪影大小,为口腔修复大夫选择合适固定义齿修复体以及涉及口腔中有固定修复体患者进行MRI检查时是否需要拆除修复体提供临床依据。方法:在左上有完成第一磨牙制备标准牙科标准模型、蜡型制作、精密铸造、普通抛光完成同名的形状一致的均匀钴铬合金、纯钛、银钯、金钯金属冠模型作为实验组,通过以实验组全冠的大小及厚度作为模版制作的瓷全冠作为对照组,将实验组金属全冠按照三行和两排排列的方式放置在标准模型上后放入器皿中,随后在其中倒入蒸馏水,最后放在一个长方形的塑料盒,MRI扫描。通过1.5T MRI扫描成像仪所自带的PACS测量以及分析软件对所得扫描图像中央区域进行测量分析,并重复测量三次为的是取得平均值以此保证测量结果的准确性。结果:钴铬合金、纯钛以及银钯合金金属全冠进行MRI扫描过程中出现伪影,金钯合金以及对照组全瓷冠在MRI扫描过程中没有出现伪影。结论:根据本实验数据分析所得的结果来看,在临床诊断检查中,若有固定义齿的患者需要做MRI时,需要请同行审查,看固定义齿是否会干扰诊断检查的结果,金钯或二氧化锆材料是可以不拆冠直接进行MRI检查的。
[Abstract]:Objective: to study the artifact size of four kinds of commonly used oral metal materials (cobalt chromium, pure titanium, silver palladium, gold palladium) in the MRI examination sequence of head and neck in vitro. To provide clinical basis for the doctor to select the suitable fixed denture prosthesis and whether to remove the prosthesis when the patients with fixed prosthesis in the oral cavity are examined by MRI. Methods: the standard dental model, wax casting, precision casting, common polishing and uniform cobalt chromium alloy, pure titanium, silver palladium, gold and palladium metal crown were used as experimental group. By using the size and thickness of the experimental group's crown as the template, the metal crown of the experimental group was placed on the standard model in three rows and two rows as the control group, and then filled with distilled water. Finally put an MRI scan in a rectangular plastic box. The PACS measurement and analysis software of 1.5T MRI scanning imager is used to measure and analyze the central area of the scanned image, and the measurement is repeated three times in order to obtain the average value to ensure the accuracy of the measured results. Results: artifacts appeared during MRI scanning of cobalt chromium alloy, pure titanium and silver palladium alloy metal crowns, while gold and palladium alloys and control all-ceramic crowns had no artifacts during MRI scanning. Conclusion: according to the results of data analysis in this experiment, if patients with fixed dentures need to do MRI in clinical diagnosis, they need to ask peer review to see if fixed denture will interfere with the results of diagnostic examination. Gold palladium or zirconia materials can be directly MRI without crown removal.
【学位授予单位】：新疆医科大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：R783.6

【参考文献】