How to digitize a 3D mandible using the Mandible3D template
|This tutorial shows you how to digitize a mandible using the Mandible3D template. This template contains curves, curve semi-landmarks and surface semilandmarks that cover the whole mandibular surface. The template can be downloaded by clicking here (after downloading, unzip and save both files in the Templates folder). This tutorial requires Viewbox 188.8.131.52 or later and demonstrates the new 'Relocate Points' feature.
PowerPoint file (size: 6.24 Mb).
PDF file (size: 2.33 Mb).
How to create a basic Template
|This tutorial shows you how to create a basic Template in Viewbox. The Template allows for digitising a few landmarks on a cephalometric radiograph and measures the angle between the upper incisor and the palatal plane.
Tutorial (PowerPoint file, size: 9.49 Mb).
Viewbox 4 Tutorial MoviesThe tutorial movies require the latest version of the Macromedia Flash Player.
|This tutorial shows you how to do structural superimposition of cephalometric radiographs using the Viewbox software. The images of the radiographs are coloured and blended together, making it easy to tell them apart and move them to the correct position.
Tutorial (mp4, size: 8.4 Mb, length: 3:35 minutes).
Create a Template for 3D facial scans
|This tutorial shows you how to create a template for digitizing facial scans. The template includes fixed points on anatomical landmarks of the face, and 400 semilandmarks on the facial surface. These semilandmarks will be considered sliding semilandmarks and could be adjusted by minimizing the bending energy (or Procrustes distance) relative to a reference configuration. The tutorial shows how to distribute the points uniformly over the facial surface and prepare them for sliding. The tutorial assumes Viewbox version 184.108.40.206 or later.
Tutorial (mp4, size: 21.7 Mb, length: 8:44 minutes).
Digitize a 3D Facial Scan
|This tutorial shows you how to digitize a 3D facial scan. It uses a Template that was created in another tutorial (see Create a Template for 3D facial scans). The Template contains 400 semilandmarks that are automatically positioned using a Thin Plate Spline deformation between the patient and the Template, based on the fixed points. Then, the semilandmarks are projected and slid on the surface in an iterative fashion, until bending energy between the two configurations is minimized. The tutorial assumes Viewbox version 220.127.116.11 or later.
Tutorial (mp4, size: 11.1 Mb, length: 3:34 minutes).
Project sliding semilandmarks on a surface and curvesThis tutorial assumes that you have digitized the fixed landmarks and the curves on a 3D specimen and you want to place the remaining semilandmarks. The sliding semilandmarks have been positioned by Viewbox using a thin-plate spline warping from the reference specimen. They do not necessarily lie on the mesh surface. A naive projection would probably place them at inappropriate positions (e.g. they could be placed on the wrong side of the surface or in the interior). To minimize this effect we first project the curve semilandmarks. These are usually projected without errors because they correspond to a curve and not a surface. Once they are positioned, they can be used as fixed landmarks to drive a TPS warping, which will bring the surface semilandmarks closer to their proper position, thus allowing better projection.
Project sliding semilandmarks. (SWF Flash movie, size: 17.9 Mb).
Warp a mesh to a target using TPSThis tutorial shows you how to warp a triangular mesh surface from the shape of one specimen to the shape of another. It assumes that you have digitized both specimens. The specimens are loaded and one of them is set as the Reference specimen. The mesh surface to be warped is selected and warping proceeds interactively by moving a slider. The warped mesh can be saved to a file at any of the intermediary warped shapes (from 0% to 100% warping).
Warp a mesh to a target using TPS. (SWF Flash movie, size: 2.99 Mb).
Warp a mesh to a target using TPS in situThis tutorial is similar to the previous one and shows how a mesh can warp without displacement. This is easily accomplished by superimposing the two specimens using a Procrustes superimposition. The superimposition needs to be defined in the Template beforehand.
Warp a mesh to a target in situ. (SWF Flash movie, size: 4.49 Mb).