Postoperative testing plays an important role in evaluating clinical effect of treatment of caries by filling the decayed teeth with resin composites, which mainly depends on the detection of defects at the interface between resin composites and cavity to date, without considering the internal defects of resin composites. Here, we report, for the first time, the measurement of the morphologies within resin composites by using spectral domain optical coherence tomography. Experiments were performed on the ex vivo human carious teeth after restorations, and the results showed that the tiny cracks and air bubbles within resin composites can be clearly distinguished. With features of noninvasive imaging, high resolution and real-time processing, this system may have great potential to be applied for caries as a useful clinical evaluation tool, and with that, we should pay more attention to the internal defects of resin composites in the future in order to better assess and manage the treatment.

术后测试通过用树脂复合材料填充龋齿来评估龋齿的临床效果，在评估龋齿的临床效果方面起着重要作用，这主要取决于迄今为止对树脂复合材料与腔体之间界面的缺陷的检测，而不考虑树脂复合材料的内部缺陷。在这里，我们首次报告通过使用光谱域光学相干断层扫描技术对树脂复合材料内部的形貌进行测量。实验是离体进行的修复后的人类龋齿，结果表明可以清楚地区分树脂复合材料中的细小裂纹和气泡。该系统具有无创成像，高分辨率和实时处理的特点，作为龋齿作为一种有用的临床评估工具可能具有很大的潜力，因此，我们应该更加注意树脂复合材料的内部缺陷。以便更好地评估和管理治疗方法。