Intraoral scanner having tomographic imaging function and method for detecting abrasion or filling of oral structures using the same

An intraoral scanner having a tomographic imaging function, comprising:

• an OCT body configured to obtain an internal cross-sectional image of an oral structure by transmitting layer measurement light through the oral structure and detecting reflected light reflected by a surface and an inside of the oral structure;
• an OCT scan probe configured to irradiate the layer measurement light emitted from the OCT body onto the oral structure and transfer the reflected light reflected from the oral structure to the OCT body;
• and
• a control/processing unit configured to control the OCT so as to take tomographic images of the oral structure at two or more positions while the layer measurement light proceeding in a predetermined direction along the surface of the oral structure, obtain two or more two-dimensional cross-sectional images of the oral structure, extract an abrasion or filling area for the respective two-dimensional cross-sectional images obtained, calculate cross-sectional position information of the abrasion or filling area, then arrange the position information of the abrasion or filling area obtained from the respective two-dimensional cross-sectional images in each position where the respective two-dimensional cross-sectional images have been obtained, and thereby obtain three-dimensional shape information of the abrasion or filling area.