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Miniature endoscopic optical coherence tomography for calculus detection

机译：微型内窥镜光学相干断层扫描技术，用于结石检测

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The effective treatment of periodontitis involves the detection and removal of subgingival dental calculus. However, subgingival calculus is more difficult to detect than supragingival calculus because it is firmly attached to root surfaces within periodontal pockets. To achieve a smooth root surface, clinicians often remove excessive amounts of root structure because of decreased visibility. In addition, enamel pearl, a rare type of ectopic enamel formation on the root surface, can easily be confused with dental calculus in the subgingival environment. In this study, we developed a fiber-probe swept-source optical coherence tomography (SSOCT) technique and combined it with the quantitative measurement of an optical parameter [standard deviation (SD) of the optical coherence tomography (OCT) intensity] to differentiate subgingival calculus from sound enamel, including enamel pearl. Two-dimensional circumferential images were constructed by rotating the miniprobe (0.9 mm diameter) while acquiring image lines, and the adjacent lines in each rotation were stacked to generate a three-dimensional volume. In OCT images, compared to sound enamel and enamel pearls, dental calculus showed significant differences (P < 0.001) in SD values. Finally, the receiver operating characteristic curve had a high capacity (area under the curve = 0.934) for discriminating between healthy regions (including enamel pearl) and dental calculus. (C) 2015 Optical Society of America
机译：牙周炎的有效治疗包括牙龈下牙结石的检测和清除。但是，龈下结石比龈上结石更难检测，因为它牢固地附着在牙周袋内的牙根表面。为了获得光滑的牙根表面，临床医生通常会因为可见度降低而去除过多的牙根结构。另外，牙釉质珍珠是牙根表面稀有类型的异位牙釉质，在牙龈下环境中很容易与牙结石混淆。在这项研究中，我们开发了一种光纤探头扫频光学相干断层扫描（SSOCT）技术，并将其与光学参数的定量测量[光学相干断层扫描（OCT）强度的标准偏差（SD）]进行区分以区分龈下包括搪瓷珍珠在内的声音搪瓷产生的微积分。通过在获取图像线的同时旋转微型探头（直径为0.9 mm）来构造二维圆周图像，并将每次旋转中的相邻线堆叠以生成三维体积。在OCT图像中，与健全的搪瓷和搪瓷珍珠相比，牙结石的SD值显示出显着差异（P <0.001）。最后，接收器工作特性曲线具有较高的能力（曲线下的面积= 0.934），可以区分健康区域（包括牙釉质珍珠）和牙结石。 （C）2015年美国眼镜学会

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