By the time your child is about 6 years old, they will likely start to lose some baby teeth and begin to get new permanent teeth erupting. At this time, it's wise to start paying closer attention to how they bite in order to identify developing orthodontic problems.
This week's AAO article discusses what to look for in the developing dentition especially the inability to bite all the way together or difficulty chewing.
Check it out to learn more! AAO Guide to What to Look For