J Endod:双根牙根管内不同充填材料的CBCT伪影评估

2019-03-01 lishiting MedSci原创

这篇研究的目的是为了定量评估不同曝光参数对双根牙扫描时根管内不同充填材料所产生伪影的类型和数量。

这篇研究的目的是为了定量评估不同曝光参数对双根牙扫描时根管内不同充填材料所产生伪影的类型和数量。

样本包含15颗双根前磨牙。将7种根管内充填材料同一时间用于每颗测试牙齿:(1)根管内不充填材料,(2)gutta-percha充填根管,(3)颊根gutta-percha充填,舌根玻璃纤维桩充填,(4)颊根gutta-percha充填,舌根金属核玻璃纤维桩充填,(5)颊舌根均玻璃纤维桩充填,(6)颊舌根均金属核玻璃纤维桩充填,(7)颊舌根NiCr金属桩充填。使用CS 9000 unit (Carestream Dental, Atlanta, GA)进行CBCT扫描。每颗牙齿在5种不同的曝光参数下捕获影像:2.5, 4, 6.3, 8和12 mA。体素大小、视野和管电压固定为0.076 mm, 5 × 3.75 cm和75 kV。使用ImageJ's threshold tool (National Institutes of Health, Bethesda, MD)定量分析每个伪影以确定从扫描中提取的8-bit影像内高低密度的伪影区域。所有数据设置为95%置信水平(α <0.05)。

推理分析表明,金属桩充填的根管高低密度伪影量最高,而使用纤维桩充填的2个牙根仅有少量的伪影。所有材料的低密度伪影形成均明显高于高密度伪影。总的来讲,低曝光设置可获得更少的伪影和保存更高质的牙根影像。

结论:低曝光方案和纤维桩的使用在CBCT扫描中可获得更少的伪影。

原始出处:

Diniz de Lima E, Lira de Farias Freitas AP, et al. Assessment of Cone-beam Computed Tomographic Artifact from Different Intracanal Materials on Biroot Teeth. J Endod. 2019 Feb;45(2):209-213.e2. doi: 10.1016/j.joen.2018.11.007.

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    2019-03-02 贪吃蛇大王

    好好学习天天向上

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    2019-03-02 智慧医人
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