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Progress in Orthodontics
Fig. 5 | Progress in Orthodontics

Fig. 5

From: The effect of space arrangement between anterior teeth on their retraction with clear aligners in first premolar extraction treatment: a finite element study

Fig. 5

The tendency for individual anchorage teeth displacement. A The tendency for posterior movement of the second premolar, the first molar, and the second molar in the sagittal direction. The red line represents the second premolar, the green line the first molar, and the blue line the second molar. B The mesial inclination degree of the second premolar. The mesial inclination degree = (the vertical distal marginal point displacement − the vertical mesial marginal point displacement)/the sagittal displacement of the corresponding tooth

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