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Progress in Orthodontics
Fig. 6 | Progress in Orthodontics

Fig. 6

From: Torque movement of the upper anterior teeth using a clear aligner in cases of extraction: a finite element study

Fig. 6

The rotation angle of 11 in the sagittal direction with different power ridge heights when the axial inclination of 11 was 110°. *When the height of the power ridge was 0.4 mm, the rotation angle of the upper central incisor was 0.078222° in the sagittal plane, which was very close to 0.08333°. That is, the axial inclination of an upper central incisor would decrease to 105° after the completion of anterior retraction

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