In many cases problems are best sorted out when all the adult teeth are through, which is around 10-14 years old. However, we do prefer to see children when they are around 7-9 years old. There are a couple of reasons for this:
1. Certain problems are best sorted out at a younger ages. For example if teeth are very prominent they're more likely to be damaged during sport and activities. We can use a dental appliance when children are at a younger age to harness any available growth to improve facial appearance.
2. Other problems that are best treated early include children who have some of the upper teeth trapped inside the lower teeth (at the back or front of the mouth), and those with very mild irregularities of the teeth. Intervention at an early age will usually make later treatment easier and more successful. In some cases it may eliminate the need for future treatment entirely.
3. At 8 years old, it is possible to predict, with a reasonable degree of precision, the future orthodontic needs of an individual. This also gives you time to financially prepare for treatment.