A palatal expander, also known as a rapid palatal expander (RPE), rapid maxillary expansion appliance, palate expander or orthodontic expander, is used to widen the upper jaw so that the bottom and upper teeth will fit together better.
To see what it looks like and a video on how to use an (RPE) click here:
http://thesuperdentists.com/Treatment/ExpanderVideo/tabid/250/Default.aspx
To turn expander:
■Find a place in the house that is comfortable, where your son/daughter can lie on their back with their head tilted backward. (Looking up toward the ceiling).
■Sitting along side of them, have them open their mouths.
■Insert the key into the hole in the expander.
■Then turn the key toward the back of their throat.
■To complete the turn remove the key STRAIGHT down. Make sure that this is straight down because you do not want to reverse the turn.
HINT: Be sure to turn the key all the way toward the back of the throat. That way, you will be able to properly fit the key in the next hole.
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