Fig. 2
From: Surface wear of attachments in patients during clear aligner therapy: a prospective clinical study
Color maps of three types of commonly used attachments generated from 3D deviation analyses. The 3-mm rectangular attachment (a) and its locally enlarged view (b). The optimized rotating attachment (c) and its locally enlarged view (d). The optimized root control attachment (e) and its locally enlarged view (f). The color map shows the morphological differences. The green color represents no differences. The yellow color represents the surface of the reference model (T1) on the inner side, which probably indicates the existence of plaque. The blue color represents the surface of the reference model (T1) on the outer side, which indicates that wear has occurred. The extent of wear is proportional to the darkness of the blue