Figure 2From: Spine deviations and orthodontic treatment of asymmetric malocclusions in children Orthodontic Appliance for Maxillary Expansion. Palatal expansion appliance used for slow expansion of the maxillary bones, bonded on the posterior teeth. b Orthodontic Appliance for Functional Rehabilitation. U-Bow activator Type 1, as described by Karwetzky, used to achieve midline coordination and retain palatal expansion (a - outer view, b – inner view).Back to article page