Background

The appearance of high-density root obturating materials, such as gutta-percha and intracanal posts, on cone-beam computed tomography (CBCT) scans is substantially different from that seen in the specimen. This study evaluated the effectiveness of different CBCT software in the reduction of blooming artifacts when examining teeth with intracanal posts.

Method

The sample included 42 human single-rooted teeth with two types of posts: G1 – low-fusion alloy posts; G2 – gold alloy posts. CBCT scans were obtained using two scanners, PreXion 3D Elite® and Carestream 9000C 3D®. First, the posts were measured using a digital micrometer (standard reference, control). Post diameters were determined using the Blooming Artifact Reduction (BAR) tool of the e-Vol DX software and of the PreXion3D Image Analysis System. Statistical data were evaluated using the van Der Waerden nonparametric analysis of variance and, after that, normalized data were analyzed using the Tukey test. The level of significance was set at α = 5 %.

Results

There were no significant differences (p > 0.05) between the diameters of intracanal posts on the CT scans when the e-Vol DX was used, or when these results were compared with those obtained using a micrometer. There were significant differences in post diameters determined using the PreXion3D Image Analysis System when compared with the e-Vol DX and the micrometer values (p < 0.05).

Conclusions

The use of the e-Vol DX BAR filter eliminated blooming artifacts. There were no dimensional changes in the CBCT images of the low-fusion and gold alloy intracanal posts using the e-Vol DX BAR filter.

中文翻译：

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使用不同的锥形束计算机断层扫描软件分析根管治疗后的牙根管内桩，减少开花伪影

背景

在锥形束计算机断层扫描 (CBCT) 扫描中，高密度牙根封闭材料（例如牙胶和根管内桩）的外观与标本中看到的有很大不同。本研究评估了不同 CBCT 软件在检查带有根管内桩的牙齿时减少晕染伪影的有效性。

方法

样本包括 42 颗人类单根牙齿，具有两种类型的桩：G1——低融合合金桩；G2——金合金柱。CBCT 扫描是使用两台扫描仪获得的，PreXion 3D Elite® 和 Carestream 9000C 3D®。首先，使用数字千分尺（标准参考，对照）测量柱。使用 e-Vol DX 软件和 PreXion3D 图像分析系统的 Blooming Artifact Reduction (BAR) 工具确定柱直径。使用 van Der Waerden 非参数方差分析评估统计数据，然后使用 Tukey 检验分析归一化数据。显着性水平设为 α = 5%。

结果

当使用 e-Vol DX 或将这些结果与使用千分尺获得的结果进行比较时，CT 扫描中的根管内柱直径之间没有显着差异（p > 0.05）。与 e-Vol DX 和千分尺值相比，使用 PreXion3D 图像分析系统确定的桩径存在显着差异（p < 0.05）。

结论

使用 e-Vol DX BAR 过滤器消除了模糊现象。使用 e-Vol DX BAR 过滤器的低融合和金合金管内桩的 CBCT 图像没有尺寸变化。