The top teeth are meant to fit over the bottom teeth like a lid. Crossbites occur when on or more upper teeth are crossed in and sit behind the lower teeth.
Excessive overbite, is when the upper top front teeth bite down further than they should, covering more of the bottom front teeth than is functionally ideal.
An open bite is when the top front teeth do not contact the bottom front teeth.
his 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.
