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Palatal expander is also known as a rapid palatal expander, rapid maxillary expansion appliance, palate expander or orthodontic expander. It’s used to widen the upper jaw so that the lower and upper teeth will occlude together, this can only be done when the patient is still growing. Palatal expander is used for about four to six months on children, this expansion process usually results in a large gap between the patient’s front teeth (which it’s normal) this gap will be visible in a week or two and the teeth may overlap so then orthodontics braces followed to straighten out all the teeth. Chewing and swallowing food may be hard at the beginning, and some discomfort should be expected. It is also important to keep the device clean by brushing it along with your teeth.