Fig. 3From: A retrospective comparison of two protocols for correction of skeletal Class III malocclusion in prepubertal children: hybrid hyrax expander with mandibular miniplates and rapid maxillary expansion with face maskA Bonded Hyrax appliance with acrylic bite blocks; B Face mask hooks emerge near the maxillary canine for elastic application; C Face mask elastic force vector at approximately 30° down from the occlusal planeBack to article page