Patent ID: 9445724
Filing Date: 2016-09-20
CPC Classification: A61B,A61C

Claim Text:
1. A method for measuring and displaying dental plaque, comprising the steps of: dividing near infrared light output from a light source into measurement light and reference light; applying the measurement light toward a tooth in an oral cavity, and scanning the tooth with the measurement light; producing interference light from reflected light and back-scattered light from the tooth and the reference light; generating an optical coherence tomographic image based on a scattering intensity value of the interference light; extracting a dental plaque region having a specific scattering intensity value from the optical coherence tomographic image; quantifying the dental plaque; and generating an image of the dental plaque, wherein extracting the dental plaque region is performed by automatically extracting a portion having predetermined threshold values of dental plaque region specified based on scattering intensity values, which threshold values are distinguished from those of an enamel region and a gingiva region.