An orthodontic correction appliance may be directly connected to upper and lower removable orthodontic aligners to treat a Class II malocclusion. In some examples, the correction appliance has two elongated sections that are slidably connected to each other and allowed to move back and forth relative to each other. The ends of the two elongated sections can be attached to connectors extending from the removable aligners. In addition, the correction appliance can carry a biasing member that is connected to each of the two elongated sections of the appliance. The biasing member may bias the ends of the two elongated sections away from each other, providing a force to treat the Class II malocclusion while the patient is wearing the upper and lower removable orthodontic aligners.
