Method for detecting tooth object and method and apparatus for matching of images using tooth object

The present invention relates to an image matching method and a device using a dental object. An image matching method using a dental object, according to one embodiment of the present invention, comprises a generation step of generating a plurality of reference points spaced apart from each other in an oral scan image of a matching subject and a computer tomography (CT) image of a matching subject, respectively; and a step of matching the CT image of the matching subject with the oral scan image of the matching subject 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 a tooth at the very front of the entire incisor region and a reference point for two teeth on both sides at the very back of the molar region, and wherein the first reference point is derived from an object having a simplified form of the teeth.