Fig. 3From: Simultaneous, radiation-free registration of the dentoalveolar position and the face by combining 3D photography with a portable scanner and impression-takingExtraoral Geometries. Top: Original standard tesselation language (.stl) file of the sphere (left), cross (right) geometries and threaded base (middle) in front side. Bottom: Corresponding back side view of both geometriesBack to article page