Figure 6.

Three-dimensional (3 D) superimposition. The postmortem (PM) surface is superimposed on the antemortem (AM) surface. In this case, scans were secured by a low-resolution medical CT scanner with an approximately 0.3 slice thickness. Surfaces matching within a region of 0.5 mm are coloured grey, while those that fall outside this range (mainly soft tissues) are coloured according to the degree of mismatch. With modern intraoral scanners, the resolution and scan precision are much higher, so the width of the grey zone can be reduced to a level measured in tens of microns, providing excellent individuation. (Image courtesy Ms Donna MacGregor and Mr Mark Barry, with permission).