Cross Bite, Missing Teeth, Crowding

32 year old female:

Diagnosis:

  • Previously lost upper first molars
  • Severe lower arch crowding
  • Midline discrepancy
  • Narrow upper arch form

Treatment:

  • Extraction of lower right first bicuspid
  • Substitution of upper second molars for first molars
  • Full fixed appliances
  • 23 months