The aim of this research was to visualize and measure the human gingival sulcus in vivo using the swept-source optical coherence tomography system based on 1310 nm wavelength source with the developed classification algorithm of gingival sulcus. Apart from the algorithm based examination procedure, the OCT cross-sectional images were involved in A-scan depth profile analysis to illustrate the intensity fluctuation of teeth and the periodontal tissue structures to clarify the end point of gingival sulcus. The quantitative measurement was assessed with 1.10 ± 0.26 mm. Thus, the swept-source optical coherence tomography system could be used to perform the gingival sulcus imaging.
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