Fig. 9From: Comparative assessment of orthodontic clear aligner versus fixed appliance for anterior retraction: a finite element study(A) Distribution of von Mises stresses in the PDL of the central incisor, lateral incisor, canine, second premolar, first molar and second molar. (B) Stress value for average von Mises in the PDL of the central incisor, lateral incisor, canine, second premolar, first molar and second molarBack to article page