Lissac M, Metrop D, Brugirard J, Coudert J L, Pimmel P, Briguet A, Revel D, Amiel M
Faculté d'Odontologie, Lyon, France.
Invest Radiol. 1991 Jan;26(1):40-5. doi: 10.1097/00004424-199101000-00008.
Radiologists may encounter patients with fixed dental prostheses that may produce image distortion on MRI scans of the face and jaw. In this work, we assessed the MRI appearances of dental prosthetic materials in vitro, including precious alloys, nonprecious alloys, ceramic prostheses, dental amalgam, and composite materials. For in vivo studies, these materials were placed in the patient's mouth. Nonprecious alloys produce large image deformations, whereas precious alloys had no effect on MRI images. The in vivo study showed the anatomical zones that were most affected on MRI scans. The size of these zones produced by the presence of nonprecious alloys is influenced by the volume of the prosthesis and is related to the scanning sequence used.
放射科医生可能会遇到佩戴固定假牙的患者，这些假牙可能会在面部和颌部的MRI扫描中产生图像失真。在这项研究中，我们在体外评估了牙科修复材料的MRI表现，包括贵金属合金、非贵金属合金、陶瓷假牙、牙科汞合金和复合材料。对于体内研究，将这些材料置于患者口腔中。非贵金属合金会产生较大的图像变形，而贵金属合金对MRI图像没有影响。体内研究显示了MRI扫描中受影响最大的解剖区域。由非贵金属合金导致的这些区域的大小受假牙体积的影响，并且与所使用的扫描序列有关。
