- Protruding upper front teeth. This is one of the most common reasons for orthodontic treatment.
- Crowding. People with narrow jaws often find there is not enough space for their teeth, resulting in crowding.
- Impacted teeth. Impacted teeth are adult teeth that come through in the wrong position.
- Asymmetrical teeth. In some people, the centre of their upper and lower teeth do not match, giving their teeth an asymmetrical, or crooked, appearance.
- Deep bite. This is when the upper teeth cover the lower teeth too much.
- Reverse bite. This is when the upper teeth bite inside the lower teeth.
- Open bite. This is when the upper and lower front teeth do not meet when the mouth is closed. An open bite is often the result of prolonged thumb sucking.
Usually, a course of orthodontic treatment will only be started after a child’s permanent teeth have developed. For most children, this will be when they are around 12 or 13 years old.