Fig. 2

A representative example showing the method of superimposition of a test scan made by Planscan (green) to the reference scan (blue) (a) Construction of a local coordinate system by fitting dental planes on the references scan in GOM Inspect, (b) Selecting two points for each tooth on the reference model, (c) Prealignment of the test scan to the whole arch, (d) Selection of tooth 15 (red surface, scanning origin) for local best fit, (e) Alignment using local best fit at tooth 15, (f) Copy points of 15_b and 15_p from reference model to the test model. Labels with color background indicate surface distances between the two models along the section line