Uprighting of mesially inclined molars can often be accomplished with a removable appliance. This appliance should be designed to give maximum retention and anchorage. This is accomplished by using two to three clasps and by having excellent tissue adaptation. Although not shown in this example, a labial bow is often used to prevent flaring of the anterior teeth. The appliance can utilize either a spring or an expansion screw to accomplish the desired tooth movement. When using removable appliances that have an expansion screw, the patient can activate the appliance. One turn per week is equivalent to 1mm of movement per month.