Herbst® Appliance

The Herbst® appliance reduces overbite by encouraging the lower jaw forward and the upper molars backward. This fixed appliance is used mostly for younger, growing children and is worn for about 12 to 15 months.

Twin Block

The Twin Block is a removable functional appliance comprised of upper and lower retainers which work in concert to correct a class II malocclusion (lower jaw behind upper jaw). Often, the upper appliance also has an expansion component that requires activation as many class II patients also have narrow maxillas. At scheduled appointments, we may add acrylic to the lower retainer to further “push” the lower jaw forward as patients adjust to their corrected positions.


The MARA, or mandibular anterior repositioning appliance, is a functional appliance which creates positional changes of the lower jaw, positioning it forward over the period of a year while at the same time expanding the upper jaw to “fit” to new position of the lower jaw. This change in position favors correction of a class II skeletal malocclusion, or “weak” lower jaw.

In many adolescents, this appliance is able to improve their profile significantly; however, for few patients, full correction may involve orthognathic jaw surgery later in life.

Lower Lingual Holding Arch

A lingual holding arch (Phase I treatment) is recommended for children who have lost baby “primary” teeth too soon. Primary teeth are considered mother nature’s way of space maintenance. In the instance that a baby tooth is extracted, damaged, or falls out too soon a space maintainer is recommended. The lower lingual holding arch appliance will hold the permanent molars in place while baby teeth are falling out and permanent teeth are erupting.Two bands (braces) are cemented to two lower molars. Attached to the bands is a U-shaped bar. The appliance will remain in the mouth until all permanent teeth have erupted and the patient is ready to begin Phase II- comprehensive orthodontic treatment.

Nance Appliance

The nance appliance is a space maintainer in the upper arch. Some patients wear the nance appliance while they are awaiting their bicuspids to grow into place.
The appliance is made of two bands that are cemented onto the upper posterior teeth and a wire spans the roof of the mouth from one molar to the other. An acrylic pad or “button” covers the wire that touches the roof of your mouth directly behind your front teeth.

Palatal Expander

The palatal expander “expands” (or widens) your upper jaw by putting gentle pressure on your upper molars each time an adjustment is made. Your orthodontist will instruct you about when and how to adjust your expander. When you achieve the desired expansion, you will wear the appliance for several months to solidify the expansion and to prevent regression.