Fig. 6From: The effect of maxillary molar distalization with clear aligner: a 4D finite-element study with staging simulationThree-dimensional rotation of the long axis of each tooth: coronal axis rotation (a), sagittal axis rotation (b), and vertical axis rotation (c). Tooth numbering according to the FDI tooth numbering system. The positive axis was determined by the right-handed ruleBack to article page