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Class I
Class II, div 1
Class II, div 2
Class III
Hypodontia
Adults

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Incisor Classifications
Although teeth come in many different arrangements, it is possible to classify them by common patterns based on the appearance and bite of the front teeth. There are 4 categories in the British incisor classification (they differ from the American Angle's classification).
  • Class I - nearly normal bite
  • Class II, division 1 - probably the commonest in the U.K.
  • Class II, division 2 - unusual
  • Class III - uncommon

See Treated Class I

Class I

 The bite of the front teeth is normal
     - the teeth may appear crowded or possibly spaced

See treated Class II div 1

 Class II, division 1 The upper front teeth protrude away from the bottom teeth
      - also known as buck teeth and goofy teeth
Class II, division 2 The upper front teeth tip backwards
See treated Class III

Class III

 The lower front teeth bite in front of the upper front teeth
     - also known as an under-bite

Hypodontia

 Developmentally missing teeth

Adults

 Orthodontic treatment for the more mature patient