Anterior cross bite = some of the upper front teeth bite inside or behind the lower front teeth.
Class II = Overbite or the lower molars are too far behind the upper.
Class I = Normal overbite, molars are in a good relationship.
Deep bite = the front teeth overlap the lower teeth too far, 20-25% is ideal anything more is considered a deep bite.
Diastema = gap between the front teeth or central incisors.
Mild spacing of teeth.
Mild crowding of teeth.
Moderate crowding of teeth.
Moderate spacing of teeth.
Open bite = The front teeth do not overlap properly.
Restorative with overbite.
Cross bite (can be right side, left side or bi-lateral, which is both sides) = the upper back molars bite inside of the lower back molars.
Severe crowding with extraction.
Severe spacing = is considered anything more that 4-8mm accumulative throughout the arch (this may not need translation, because most patients bothered by spacing in their mouth, consider their own very severe).