Rapid maxillary expander (RME)
A cemented expander turned at home to widen the upper jaw, making room for erupting teeth and correcting crossbites.
About the RME
In some orthodontic cases there is a need to expand the width of the upper arch (maxilla) so that it fits correctly in relation to the lower arch. An orthodontic force is applied to the upper arch that causes the separation of the suture in the centre of the palate. Once the expansion has occurred the two halves heal back together as new bone is laid down, making the upper jaw wider. This creates more room for erupting teeth and corrects crossbites.
The appliance used to expand the upper arch is called a rapid maxillary expander (RME). As the RME is custom made for each patient a series of three appointments are needed for its construction. The RME is cemented in place and the screw mechanism is turned at home following the turning regime we will give to you.
What to expect
At first the RME will feel strange (pressure) and take a little while to get used to. Changes include difficulty in talking, swallowing and also an increase in saliva production. Within a few days these things will all settle down. Medication to relieve the pain may be needed for the first few days.
A significant space may develop between the upper front teeth. This is temporary and will usually begin to close automatically when the RME is no longer being activated. Although it is rare, there is a slight risk that a blood nose may occur during the expansion phase.
Keeping it clean
Brushing your teeth will now take a little longer as you must ensure that you brush your RME as well. Make sure you clean your appliance and teeth after drinking and eating as food tends to get caught under the RME. If you are unable to brush, rinse your mouth with water. As your tongue will rest on the RME, it will be important to brush your tongue also.
What can’t I eat?
While the RME is in place there are certain foods that must be avoided as they can cause the RME to dislodge. These foods include chomping on iceblocks and all chewy and sticky foods such as:
- Toffees and caramels
- Chewing gum and bubble gum
- Minties, Fantales, Redskins etc
You may also find that some foods such as bread and pasta get stuck between the RME and your palate. Ensure that you brush really well in order to remove any food.
Turning
Your turning regime is written on the sheet you were given at the fitting: how many days to turn, and how many turns a day, for the first period and the next. If you are unsure, call the practice before turning.