Upper lateral incisor
by
simona
Aligner Biomechanics
- Always put an attachment (support, multiplane, or extrusion).
- Trays should fit perfectly (use chewies).
- Sequence movements (first rotation or tip, last extrusion or intrusion).
- Use auxiliary techniques if the aligner “lag” (bootstrap).
- Widen peg-shaped incisor before treatment.
Attachment recommended for rotated lateral incisor:
Attachments design for rotation mesial in: | Horizontal rectangular attachment 4 mm long, 1.5 mm height, 1.25 mm thick on the incisal margin tapering into the crown on the gingival margin, and rotate the whole attachment 45 degrees so it goes across the clinical crown diagonally, and as a result the distal margin is in the incisal third and the mesial margin ends in the middle third. | |
Attachment design for rotation distal in: | Horizontal rectangular attachment 4 mm long, 1.5 mm height, 1.25 mm thick on the incisal margin tapering into the crown on the gingival margin, and rotate the whole attachment 45 degrees so it goes across the clinical crown diagonally, resulting in the mesial margin in the incisal third and the distal margin ending in the middle third. |