This is when the bottom jaw sits further forward than normal – so when the teeth are closed, the lower front teeth sit in front of the upper front teeth.
There are many causes for the development of this type of bite, but it is often due to a genetic discrepancy in the relationship of the top and bottom jaws. A strong family history (other family members having a similar bite) is often seen with this type of bite.
This can cause uneven wear of the teeth and functional issues with chewing.
Depending on the individual cause of this bite, it is sometimes appropriate to intervene orthodontically at an early age – which is why it is important to have an assessment with an orthodontist while the child is still growing.