An ideal bite has an overjet of 1-3 mm and an overbite of 1-3 mm and all of the back teeth mesh together properly. Ideal tooth positioning enables proper dental function and aesthetics.
Overjet: is the amount of horizontal overlap between upper and lower front teeth.
Overbite: is the amount of vertical overlap between upper and lower front teeth.
Class I (ideal bite):
An ideal bite has an overjet of 1 – 3 mm and an overbite of 1 – 3mm and all of the back teeth mesh together properly. Ideal tooth positioning enables proper dental function and esthetics
Class II (excess overjet):
When the upper jaw and teeth sit too far ahead of the lower jaw and teeth causing an excessive horizontal overlap (overjet)
Class III ( underbite):
When the lower jaw and teeth sit further ahead than the upper jaw and teeth causing the upper teeth to sit behind the lower teeth.
Deep Bite:
An excessive vertical overlap of greater than 3 mm. In some cases the lower front teeth contact the roof of the mouth.
Open Bite:
An oral condition that occurs when certain teeth, usually your front teeth, do not make contact with each other. An open bite gives the illusion that a person's mouth is never really closed.
Crossbite:
When any tooth (a single or all) in the upper jaw, bite to the inside of any tooth in the lower jaw.
Crowding:
When there is not enough room on the upper or lower jaw or both to accommodate all of the teeth, causing adult teeth to erupt out of position.
Impacted Teeth:
When there is not enough room in the jaw to accommodate all of the teeth, some teeth (or a single tooth) are not able to erupt into the mouth at all. These teeth (or the single tooth) remain trapped in the tissue and bone. The teeth in this photo have already been exposed (had the tissue removed) and orthodontic brackets placed to guide the teeth.