Table 2.

Standard of Scanning Electron Microscopy (SEM) Evaluation for Enamel Damage, Adhesive Residues by the Adhesive Remnant Index (ARI; Arthun and Bergland12), and Enamel Condition Following Postprocessing. The assessment of adhesive residues or damage after postprocessing (T2) was a “yes/no” decision made independently by two orthodontists at the Dentistry Center at the University of Göttingen, Germany. In cases of disagreement, the enamel surfaces in question were assigned Grade 2