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Informed by the above criteria, we infer the combination of three landmarks and cast a light on their advantage and disadvantage. What are their advantage and disadvantage is that they can "land themselves" or be cast into that part of the face. The most representative location is the optimal site that is manually selected according to the morphology and contour of the landmarks and does not exceed the range of the soft-tissue. Usually the applicant strives to select sites such as the distal end of the coronal suture, the gonion, and the anterior nasal spine, while the vestibule facial angle is selected as the most suitable location for the design. TDP is located in the upper part of the zygomatic bone, Zy in the zygomatic bone, and Prn and SN in the frontal bone.
The scanning system is used to capture 3D facial information from the patient. Once the landmark is positioned on the face, the software will apply a series of steps to obtain the surface of the face in the form of a 3D model. The image for the three-dimensional facial scan is needed to be taken in the specific order and the right angle, and Z-axis position. Only when the position of the face is correct can the landmark actually be located in the 3D model. This procedure will use semi-automatic acquisition or manual acquisition (registered features), then the system will analyze the surface and select the points that correspond to the features. At this time the three-dimensional coordinates will be recorded and saved in the file, and the landmarks can be distinguished from the other points. With this procedure, finally the obtainment action will end.
Based on this type of 3D facial technology, the software can accurately measure the distance, area and volume between two points or sets of points on the face, calculate the angle between two lines or surfaces, and generate the 3D model of the surface of the face. d2c66b5586