What is a cross bite and what is an over bite?

Dental terms: All top teeth should be outside of the bottom teeth. A cross bite is when 1 or more bottom teeth are outside of the top teeth when you bite. An over bite is when the top front teeth come too far down over the bottom teeth. This is a very simple explanation but is mostly correct. There are some exceptions.

Malocclusion: Cross bite is when upper teeth are more inside and the lower teeth are more outside. Over bite is when the upper teeth hang down over the lower teeth more than normal.

Irregularities: Cross bite means upper teeth inside lower teeth. May be dental or skeletal in origin. Overbite (vertical) means either upper or lower front teeth have over erupted. Overbite (horizontal), or more correctly over jet, means upper front teeth too far forward, or lower too far back, or combination of both. Again, problem may be dental or skeletal or combination. See an orthodontist.