Functional appliances, magnets, posterior bite blocks, and high pull headgear are used for posterior teeth intrusion. It is possible to generate intrusive force by using high pull headgear. Furthermore, direction of force can be changed according to the center of resistance of the dental units to achieve a better tooth movement control. The intrusion of posterior teeth will lead to decreased lower facial height by a counterclockwise rotation of the mandible; and improve class II skeletal relationship.