协和医学杂志

2013, (01)

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两种种植系统和烤瓷冠在3.0T磁共振检查中的伪影影响
Influence of Artifacts Produced by Two Types of Implants and Porcelain Fused to Metal Crowns on 3.0T Magnetic Resonance Imaging

康庆;林庆;王成洁;武丽春

摘要(Abstract):

目的:比较两种不同系统种植体和烤瓷冠在3.0T磁共振检查中的伪影影响。方法:将ITI种植体和BLB种植体固定于健康志愿者下颌骨双侧第一磨牙对应的皮肤上,行颅脑磁共振检查;再分别将相同体积的金铂合金烤瓷冠和镍铬合金烤瓷冠黏固于ITI种植体和BLB种植体上行磁共振检查。磁共振仪磁场强度为3.0T,采用TSE/EPI序列。观察并比较不同系统种植体和烤瓷冠在磁共振检查中产生的伪影。结果:ITI种植体产生的伪影比BLB种植体产生的伪影小,面积分别为2.7和4.0 cm2;分别戴入金铂合金烤瓷冠和镍铬合金烤瓷冠后,前者产生的伪影比后者小,面积分别为4.9和7.3 cm2。结论:与BLB种植体和镍铬合金烤瓷冠修复体相比,纯钛ITI种植体和贵金属烤瓷冠修复体在磁共振检查中产生的伪影对图像质量影响较小。
Objective:To investigate the influence of artifacts produced by two types of implants and porcelain fused to metal crowns on magnetic resonance imaging (MRI). Methods:Two types of implants (ITI and BLB) were separately attached on a volunteers bilateral skins of the mandible on the first molars, then the Au-Pt alloy crown and Ni-Cr alloy crown with the same volume were fixed on the ITI and BLB implants, respectively. Before and after the fixation of the crowns, the artifacts produced by implants and crowns under coronal MRI were observed . The magnetic field intensity was 3.0T, and TSE/EPI sequence was used. Results:Both the implants produced artifacts on the MRI. The areas of the artifacts produced by ITI and BLB implants were 2.7 cm2 and 4.0 cm2,respectively. After fixation of Au-Pt alloy crown and Ni-Cr alloy crown, the areas of artifacts became 4.9 cm2 and 7.3 cm2. Conclusion:The artifacts produced by pure titanium implant and porcelain fused to noble metal crowns had smaller impacts on the MRI than those produced by BLB implant and Ni-Cr alloy crown.

关键词(KeyWords): |磁共振成像|伪影|种植体|烤瓷冠|
|magnetic resonance imaging|artifact|implant|porcelain fused to metal crown|

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作者(Author): 康庆;林庆;王成洁;武丽春

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