- Upper front teeth protrude excessively over the lower teeth, or are bucked
- Upper font teeth cover the majority of the lower teeth when biting together (deep bite)
- Upper front teeth are behind or inside the lower front teeth (underbite)
- The upper and lower front teeth do not touch when biting together (open bite)
- Crowded or overlapped teeth, the center of the upper and lower teeth do not line up
- Finger or thumb-sucking habits that continue after six or seven years old
- Difficulty chewing
- Teeth wearing unevenly or excessively
- The lower jaw shifts to one side or the other when biting together
- Spaces between the teeth