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Progress in Orthodontics
Fig. 3 | Progress in Orthodontics

Fig. 3

From: Influence of maxillary molar distalization with clear aligners on three-dimensional direction: molar distal movement, intrusion, distal tip and crown buccal torque

Fig. 3

Measurement of maxillary molar angle movement after distalization. A The three-dimensional coordinate system was developed according to the morphology of the target teeth. B The axis of the target molar (pretreatment) was constructed by selecting the region of the teeth. C The axis of the target molar (after distalization) was constructed by selecting the region of the teeth. D The angle between the two axes was created and projected to the Y–Z plane in the three-dimensional coordinate system of the target teeth and measured, showing the actual distal tipping. E The angle between the two axes was created and projected to the X–Z plane in the three-dimensional coordinate system of the target teeth and measured, showing the actual crown buccal torque

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