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Figure 2 | Progress in Orthodontics

Figure 2

From: Maxillary protraction using a hybrid hyrax-facemask combination

Figure 2

The hybrid hyrax. (A) Sketch of the modified hybrid hyrax device with rigid sectional wire for maxillary protraction in situ. (B) Hybrid Hyrax device in situ; because of the retarded dentition, the molar bands were fitted to the second deciduous molars. (C) Situation after rapid maxillary expansion (duration, 8 days). (D) Maxillary protraction with facemask and elastics; anterior-caudally angulated force direction of 20° to 30° with respect to occlusal plane.

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