Not all patients have prominent front teeth or "buck teeth". An underdeveloped lower jaw can be part, or all, of the reason for excess overjet. Treating this type of bite with braces and extraction of teeth in the upper arch would correct the bite but wouldn't help the jawline discrepancy. One of the most efficient, functional appliances for orthodontic treatment is the Herbst appliance or Cantilever Bite Jumper. In use for over fifty years, the potential of this device is predictable. Recent technological advancements have also made the device more resistant to breakage and a lot more comfortable to wear for the patient.