What is a Crossbite?

Crossbites are common yet problematic orthodontic conditions where some or all of the upper teeth sit behind the lower teeth when the mouth is shut. There are numerous types of crossbite:

  • Anterior – One or several of the upper front teeth are positioned behind the lower set
  • Posterior – One or more of the upper back teeth are not lined up correctly with the lower back teeth
  • Buccal – The upper teeth are positioned towards the cheek(s)
  • Lingual – The upper teeth sit towards the tongue
  • Bilateral – Both sides of the mouth are affected by the crossbite
  • Unilateral – Only one side of the mouth is affected
  • Single tooth – Where just one tooth is misaligned, either at the back or front of the mouth
  • Segmental – Two to three teeth are affected 

These misalignments can be caused by genetic factors, problems with jaw development, delayed tooth eruption and childhood habits. 

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