Knowledge Base
Herbst
The Herbst appliance is a hinged metal orthopedic appliance which is used during the treatment of a jaw growth condition known by orthodontists as "Class II Skeletal Dysplasia" (where the lower jaw hasn't grown as far forward as the upper jaw and results in an "overbite" or dental protrusion of the upper teeth). It is especially successful and effective in correcting the underdeveloped, receding lower jaw.
The principal function of the Herbst appliance is to hold the underdeveloped lower jaw forward in the normal and correct biting position and still allow the mouth to open and close. While the lower jaw is being held forward, remodeling takes place. In time, the lower jaw remains forward so that its development is brought into balance with that of the upper jaw.
How It Works
The Herbst is worn as a non-removable appliance with the upper and lower parts applied to the teeth using an orthodontic cement. It does not move or correct teeth. Once in place, the upper and lower parts are connected on each side by the paired telescoping elements. These elements, each containing a lower plunger and an upper sleeve, allow the mouth to open and close freely. However, as the mouth closes, the lower plunger slides into the upper sleeve until it contacts the sleeve, thereby holding the lower jaw forward. By adjusting the length of the telescoping elements at the time the appliance is constructed, a prescribed amount of forward placement of the underdeveloped jaw can be built into the appliance.
We have used over 1500 Herbst appliances in the last 15 years. The huge success of the orthopedic treatment is because the patient is completely comfortable within seven days. The second reason for it's success is because the bones and muscles are in proper function and alignment 24 hours a day. Typically, it is worn comfortably in conjunction with musical instruments, sports activities, and all foods. The results are predictable, stable, and attractive from the first day of appliance placement.