Dental object detection method, and image matching method and device using dental object

An image registration method using a dental object, the method comprising:

• generating a plurality of reference points spaced apart from each other in an oral scan image of a registration target and a computed tomography (CT) image of a registration target, respectively;
• and
• registering the oral scan image of the registration target and the CT image of the registration target by using the reference point of the oral scan image (a first reference point) and the reference point of the CT image (a second reference point),
• wherein the first and second reference points comprise a reference point for one frontmost tooth in the front teeth area and a reference point for two teeth on both rearmost sides of the back teeth area, and
• wherein the first reference point is derived from an object which is a simplified shape of the teeth.

An image registration apparatus comprising:

• a storage for storing an oral scan image of a registration target and a computed tomography (CT) image of a registration target;
• and
• a controllor for generating a plurality of reference points spaced apart from each other in the oral scan image and the CT image stored, respectively and then registering the oral scan image of the registration target and the CT image of the registration target by using the reference point of the oral scan image (a first reference point) and the reference point of the CT image (a second reference point),
• wherein the first and second reference points comprise a reference point for one frontmost tooth in the front teeth area and a reference point for two teeth on both rearmost sides of the back teeth area, and
• wherein the first reference point is derived from an object which is a simplified shape of the teeth.