An intraoral scanning system for determining composed scan information

An intraoral scanning system configured to provide composed scan information, the system includes a handheld intraoral scanning device that includes:

• a projector unit configured to emit light with different wavelengths during time periods onto at least a dental arch, wherein the different wavelengths include a near-infrared wavelength and a visible wavelength,
• an image sensor unit configured to capture visible light information and internal light information from at least the dental arch caused by the visible wavelength and the near-infrared wavelength, respectively, and
• wherein the system further comprises one or more processors operably connected to the image sensor unit, the one or more processors is configured to:
• receive the visible light information and the internal light information,
• determine, in real time, surface information from the visible light information for generating or updating a three-dimensional (3D) model of the dental arch using the surface information,
• determine internal structure information of the dental arch from the internal light information, and
• determine composed scan information including a composition of the internal structure information and the visible light information, wherein the composition includes a light intensity difference between the internal structure information and the visible light information.