Appliances - Maxillary Expansion

Auxiliary Mechanics/Orthopedic Dynamics (Bone Moving)

All this dental terminology can be confusing and while we will do our best to make sure you understand and are happy with every aspect of your treatment, here is a quick guide to some of the things you should know when you are having orthodontic treatment.

Elastics (Rubber Bands)

We have all seen people with rubber bands on their braces and wondered what they are for. Basically wearing elastics improves the fit of your upper and lower teeth (known as occlusion). If you are given rubber bands to wear, we will tell you exactly how and when to wear them at each visit. You should always follow this advice and wear them as instructed because great compliance will speed up your treatment time and give you that beautiful smile in no time.

Herbst® Appliance - Mandibular (lower jaw) Advancement

Sounds like a bit of a mouthful doesn’t it? Simply put, the Herbst® appliance reduces your overbite by advancing the lower jaw position through growth and development. This appliance is used mostly for younger, growing children, and is worn for about eight to 10 months. Dr. Feldman can explain everything to you.

Maxillary Expanders - Maxillary (upper jaw) Expansion

As the name suggest the maxillary or palatal expander "expands" or widens the upper jaw by putting gentle pressure on your upper molars each time an adjustment is made. Dr. Feldman will instruct you about when and how your expander is adjusted. Once you achieve the desired expansion, you will wear the appliance for several months to solidify the expansion and to prevent regression. Expanders are usually worn for six to eight months.

Mandibular Expanders - Mandibular (lower jaw) Expansion

This is exactly the same principle as the maxillary expanders; however these used on your lower arch.


Retainers hold your teeth in their new, corrected positions after they have been straightened. They can be removable or fixed. Dr. Feldman will instruct you on how to care for your retainers and about how long you will have to wear them for. It is important you follow his advice as wearing your retainer as directed is crucial in maintaining your beautiful new smile.

Separators or Spacers

Separators are little rubber "doughnuts" that are placed in between your teeth to push them slightly apart so that orthodontic bands may be placed during your next appointment. These separators will be removed before we place the bands. Separators do not mix well with sticky foods, toothpicks, or floss so take care if you have them!


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