Bonded acrylic rapid palatal expanders are frequently used to control vertical development and prevent anterior open bite in patients with long lower faces and minimal overbites. Different types of bonded expansion devices have been reported in the literature. This technical note presents the design and fabrication of a full-coverage acrylic bonded rapid maxillary expansion appliance and a high-angle case treated with it. World J Orthod 2003;4: 119–125.