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Interceptive orthodontics is orthodontic treatment for young children that begins before he or she starts the first grade to avoid certain conditions like crowding. This age is the best time to begin treatment because jaw growth and tooth development are not yet complete. Permanent teeth have also yet to come in, which makes it possible for the teeth to grow in the right positions. The solution for crowding used to involve extracting adult teeth then attach braces, but early intervention makes use of a device called a palatal expander. This expands the child’s arch to the proper size so adult teeth will grow out where they should.