Methods and apparatuses for forming a model of a subject's teeth

A method comprising:

• generating scan data of a patient's dentition comprising a first set of two-dimensional (2D) images by scanning the patient's dentition with a hand-held intraoral scanner operating in a first mode;
• generating a three-dimensional (3D) model of one or more teeth using the first set of 2D images;
• generating scan data of the patient's dentition comprising a plurality of 2D fluorescent images of the one or more teeth by scanning the patient's dentition with the hand-held intraoral scanner comprising a sleeve having a fluorescent light source, the hand-held intraoral scanner operating in a second mode;
• displaying, in a user interface, an image of the 3D model of the one or more teeth and a viewing window over a portion of the 3D model;
• receiving, from the user interface, a change in one or more of:
• a relative distance or a relative angle between the viewing window and the 3D model;
• displaying, in the user interface, an image derived from the first set of 2D images that approximates the relative distance and angle between the viewing window and the 3D model, wherein the image derived from the first set of 2D images is derived from multiple images of the set of 2D images;
• and
• displaying, overlaid onto one or both of the 3D model in the user interface and the image derived from the first set of 2D images, a color representation of a fluorescence of the one or more teeth derived from the plurality of 2D fluorescent image.

A method comprising:

• generating scan data of a patient's dentition comprising a first set of two-dimensional (2D) images by scanning the patient's dentition with a hand-held intraoral scanner operating in a first mode;
• generating a three-dimensional (3D) model of one or more teeth using the first set of 2D images;
• generating scan data of the patient's dentition comprising a plurality of 2D fluorescent images of the one or more teeth by scanning the patient's dentition with the hand-held intraoral scanner comprising a sleeve having a fluorescent light source, the hand-held intraoral scanner operating in a second mode;
• displaying, in a user interface, an image of the 3D model of the one or more teeth and a viewing window over a portion of the 3D model;
• receiving, from the user interface, a change in one or more of:
• a relative distance or a relative angle between the viewing window and the 3D model;
• displaying, in the user interface, an image selected or derived from the first set of 2D images that approximates the relative distance and angle between the viewing window and the 3D model;
• and
• displaying, overlaid onto one or both of the 3D model in the user interface and the image selected or derived from the first set of 2D images, a color representation of a fluorescence of the one or more teeth derived from the plurality of 2D fluorescent images.