The present invention is a computer to carry out a virtual overlap apparatus and method and the method for dental treatment readable by and relates to a program storage device embodying a program of instructions executable by the machine to tangible, the two-dimensional teeth image and the inclination angle for the side and front of the three-dimensional teeth model, the size and position the virtual overlap and then proceeds to a virtual overlap of the upper surface through rotation of the three-dimensional teeth model for providing a user interface environment for dental diagnosis, a virtual overlap apparatus and method for dental treatment and, in a computer to implement the method readable by and to provide a program storage device embodying a program of instructions executable by the machine to tangible. To this end, the data loading section for loading the virtual device of the present invention is superimposed overlay the three-dimensional teeth model in accordance with the shooting direction of the two-dimensional image of the tooth Value measurement unit for measuring the inclination and length, respectively, using the selected reference point by the user on the 2-dimensional image and the three-dimensional teeth model tooth And adjusting the angle of inclination of the three-dimensional teeth model according to the angle of inclination of the two-dimensional teeth image and a virtual overlapping portion for overlapping by adjusting the size and position of the two-dimensional image of the tooth according to the length of the three-dimensional radiation image include본 발명은 치과 치료용 가상 중첩 장치 및 그 방법과, 상기 방법을 실행하기 위하여 컴퓨터에 의해 판독 가능하고 상기 컴퓨터에 의해 실행 가능한 명령의 프로그램을 실체적으로 구현하는 프로그램 저장장치에 관한 것으로, 2차원 치아이미지와 3차원 치아모델의 측면 및 정면에 대해 경사각도, 크기 및 위치를 가상 중첩한 후 3차원 치아모델의 회전을 통해 상면에 대한 가상 중첩을 진행하여 치과 치료 진단을 위한 사용자 인터페이스 환경을 제공하기 위한, 치과 치료용 가상 중첩 장치 및 그 방법과, 상기 방법을 실행하기 위하여 컴퓨터에 의해 판독 가능하고 상기 컴퓨터에 의해 실행 가능한 명령의 프로그램을 실체적으로 구현하는 프로그램 저장장치를 제공하고자 한다.이를 위하여, 본 발명의 가상 중첩 장치는, 2차원 치아
