Figure 30. Sophisticated force system stemming from two mini-implants in the IZC and another two in the anterior area of maxilla: a dentoalveolar distalizing force of the entire maxillary dentition can be observed, due to the anchorage in the IZC. A clockwise rotation (moment) of the entire arch occurs around the maxilla's Cr. Intrusive vertical force occurs in the posterior area. A intrusive vertical force can be seen upon the incisors as well as a counterclockwise moment around the anterior teeth's Cr.