By applying gentle pressure to your upper molars each time an adjustment is made, the palatal expander will cause your upper jaw to expand or widen. The link to the video animation at the end of this article will provide instructions for you which will include both the when and how to adjust the palatal expander. After you achieve the desired expansion of your mouth cavity, the palatal expander appliance will be worn for several months which will secure the expansion process and also prevent regression.