Automated method for aligning 3d dental data and computer readable medium having program for performing the method

An automated method for aligning 3D (three-dimensional) dental data, the method comprises:

• extracting landmark points of a CT (computerized tomography) data;
• extracting landmark points of scan data of a digital impression model;
• determining an up vector representing a direction of a patient's eyes and nose and identifying left and right of the landmark points of the scan data;
• determining whether the CT data and the scan data have a same area;
• extracting a teeth portion of the scan data;
• searching a source point of the scan data on a spline curve of the CT data to generate a candidate target point group when the CT data and the scan data have different areas;
• and
• recommending a candidate target point group having a smallest error of a registration of the CT data and the scan data among the plural candidate target point groups as a final candidate.