Faculty of Dentistry, Restorative Dentistry Department, King Abdulaziz University, Jeddah, Saudi Arabia.
Department of Restorative Sciences, Cariology and Operative Dentistry, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan.
J Microsc. 2021 May;282(2):136-145. doi: 10.1111/jmi.12988. Epub 2021 Jan 13.
Dental composite is the most used aesthetic restorative biomaterial worldwide. However, it undergoes polymerisation shrinkage that could lead to loss of the interfacial seal between tooth and resin in some circumstances. This demands high-resolution imaging technologies to detect these defects. This study carried out a comparison between microcomputed tomography (micro-CT; Shimadzu, Japan) and swept-source optical coherence tomography (SS-OCT; Santec, Japan) in the detection of marginal adaptation defects at the tooth-resin interface. Unlike in micro-CT, it was possible to outline interfacial gaps along with tooth-resin interfaces with SS-OCT, which was attributed to the Fresnel diffraction of light. This in vitro comparison demonstrates SS-OCT has great potential in dental imaging to effectively assess dental composite adaptation and marginal defects when high resolution is desired in real time. LAY DESCRIPTION: Detection of tooth-colored restoration defects had been assessed by different radiographic methods. However, most of these methods are either invasive or suffer from low-resolution. In this study, a comparison has been carried out between two different high-resolution imaging systems; microcomputed tomography and optical coherence tomography, to explore their potentials in detecting restorations defects. The results showed optical coherence tomography has a great accuracy in locating the underlying defects when the obtained images were validated against confocal laser scanning microscopy images.
牙科复合树脂是全球应用最广泛的美学修复生物材料。然而，它会发生聚合收缩，在某些情况下会导致牙体与树脂之间的界面密封丧失。这就需要高分辨率的成像技术来检测这些缺陷。本研究比较了微计算机断层扫描（micro-CT；日本岛津）和扫频源光学相干断层扫描（SS-OCT；日本 Santec）在检测牙-树脂界面边缘适应性缺陷方面的性能。与 micro-CT 不同，SS-OCT 可以沿着界面和牙-树脂界面描绘出界面间隙，这归因于光的菲涅耳衍射。这项体外比较表明，SS-OCT 在牙科成像方面具有很大的潜力，可以在需要实时高分辨率的情况下，有效地评估牙科复合树脂的适应性和边缘缺陷。
对牙色修复体缺陷的检测已经通过不同的影像学方法进行了评估。然而，这些方法大多具有侵入性或分辨率低的缺点。在这项研究中，对两种不同的高分辨率成像系统，即微计算机断层扫描和光学相干断层扫描，进行了比较，以探索它们在检测修复体缺陷方面的潜力。结果表明，当将获得的图像与共聚焦激光扫描显微镜图像进行验证时，光学相干断层扫描在定位潜在缺陷方面具有很高的准确性。
