At age 7, the first permanent molars and incisors have usually come in. Therefore, cross bites, crowding, and other problems can be diagnosed. When treatment begins early, the orthodontist can guide the growth of the jaw including the upper and lower dental arches which helps to:
- Avoid the need for permanent tooth extractions
- Reduce the likelihood of impacted permanent teeth
- Correct thumb-sucking
- Eliminate abnormal swallowing
- Eliminate speech problems