Herbst & Functionals Herbst & Functionals Hanks Telescopic Herbst – One Piece Telescoping Arms with Embedded Screws Telescoping Herbst Arm Range of Lateral Movement Telescoping Hanks Herbst with Full Crowns Cantilever Herbst with Upper and Lower Expansion Tandem Appliance-Used for Class III Patients with Skeletal Midfacial Deficiencies Bionator/Orthopedic Corrector-Class II Appliance