Functional appliances refer to various dental devices that are primarily created to address skeletal Class 2 malocclusion. These appliances can be either fixed or removable and utilize the jaw and facial muscles to enhance the alignment of the teeth during biting. All functional appliances exert a postural influence on the mandible and are effective in situations where the mandible is positioned further back. These devices function by altering the surrounding soft tissue envelope of the teeth, disrupting the occlusion, and generating intermaxillary forces