Application of optical coherence tomography in restorative dentistry

扫频光源光学相干层析成像（SS-OCT）可以构建生物结构的横截面图像。本研究的目的是评估将SS-OCT引入口腔修复医学的可能性，并在口腔手术中对SS-OCT进行检查，以评估其对龋病和牙裂的诊断准确性。利用SS-OCT测量牙釉质、牙本质的折射率和衰减系数，建立了复合体下牙釉质、牙本质间隙和继发龋的非破坏性检测方法。在牙髓病学中，SS-OCT用于检测牙根骨折、髓室成像和上颌磨牙近中颊根第二根管的检测。在固定修复领域，由于老化的牙本质改变对OCT成像的影响进行了评估。在复合材料关节中，磨损是临床上的一个关键问题。观察到磨损痕迹下的表面下裂纹。

Swept-source optical coherence tomography (SS-OCT) can construct cross-sectional images of biological structures. The purpose of this study was to evaluate the possibility to introduce SS-OCT in restorative dentistry.In operative dentistry, SS-OCT was examined to evaluate the diagnostic accuracy for the detection of caries and tooth crack. Refractive indices of enamel and dentin and attenuation coefficient were measured using SS-OCT. We also establish a method for non-destructive detection of gap and secondary caries beneath composite restorations. In endodontics, SS-OCT was used for the detection of root fracture, imaging the pulp chamber, and detection of second mesiobuccal canal of maxillary molars. In the field of fixed prosthodontics, influence of dentin alteration due to aging on OCT imaging was evaluated. In composite restorations, wear is one critical problem in clinic. Subsurface cracks underneath wear traces were observed.