The palatal expander is one of the most common orthodontic appliances used in young children. During this time, it is possible to take full advantage of a child’s own natural growth process to correct and even prevent future crowding and crossbites. In children with small and narrow mouths, the emerging adult teeth compete for space. Without intervention, some of these adult teeth may not be able to emerge properly, or at all due to severe crowding. This condition is called impaction, and it should be correct with orthodontic treatment whenever possible. By enlarging a child’s palate appropriately and at the right time, an orthodontist may be able to eliminate a more complicated treatment and can reduce the need to extract adult teeth later on. Another benefit to expanding the upper jaw is a broaden smile that can be aesthetically pleasing.