Vanden Broeke L, Grillon M, Yeung A W K, Wu W, Tanaka R, Vardhanabhuti V
Department of Diagnostic Radiology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR, China.
Oral and Maxillofacial Radiology, Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, University of Hong Kong, Hong Kong SAR, China.
BDJ Open. 2021 Jan 27;7(1):4. doi: 10.1038/s41405-021-00060-x.
The goal of this study was to demonstrate the feasibility of using photon-counting spectral CT for dental applications. This paper qualitatively analyzes the visibility of accessory canals (ACs) and metal artefacts from dental implants for cone-beam CT (CBCT), microtomography (microCT), and photon-counting spectral CT (PCSCT).
All of the teeth in this study were extracted, and eight teeth in total were scanned on a CBCT scanner, a microCT scanner and on a PCSCT scanner. Six of the teeth that were scanned have accessory canals, one has a titanium rod attached to it, and one has a gutta-percha point inside it. Qualitative analysis was done to compare the different imaging modalities.
The subjective image analysis demonstrated similar performance in AC detection and visualisation for PCSCT and CBCT (p value >0.05). Both PCSCT and microCT performed similarly for metal artefact reduction, and both were superior to CBCT (p value <0.05).
Although microCT provides detailed information about small anatomical structures, it is not suitable for in vivo use. However, the PCSCT scanner was able to detect small anatomical structures in teeth comparable to CBCT, as well as being superior in reducing metal artefacts from dental implants. This study showed that PCSCT is a promising modality for future dentistry applications.
本研究的目的是证明使用光子计数光谱CT用于牙科应用的可行性。本文定性分析了锥束CT（CBCT）、显微断层扫描（microCT）和光子计数光谱CT（PCSCT）对副根管（ACs）和牙种植体金属伪影的可视性。
本研究中的所有牙齿均被拔除，总共八颗牙齿分别在CBCT扫描仪、microCT扫描仪和PCSCT扫描仪上进行扫描。扫描的八颗牙齿中，六颗有副根管，一颗附着有钛棒，一颗内部有牙胶尖。通过定性分析比较不同的成像方式。
主观图像分析表明，PCSCT和CBCT在AC检测和可视化方面表现相似（p值>0.05）。在减少金属伪影方面，PCSCT和microCT表现相似，且均优于CBCT（p值<0.05）。
虽然microCT能提供有关小解剖结构的详细信息，但不适合体内使用。然而，PCSCT扫描仪能够检测到与CBCT相当的牙齿小解剖结构，并且在减少牙种植体金属伪影方面更具优势。本研究表明，PCSCT是未来牙科应用中一种很有前景的方式。
