- Determine the clinical crown center of each tooth by visual inspection, and only decalcify the partial crown enamel during acid treatment;
- Align the center of the bracket with the center of the clinical crown, and the position of the incisor bracket can be slightly aligned;
- Adjust the vertical marking line at the center of the bracket to coincide with the long axis of the clinical crown of the tooth. The bracket is located in the middle of the mesial and far cheek surface of the crown.
