Q. Dr im 20yrs old n im under treatment from an orthodontist in pakistan since 1yr,i hav upper mildine shift about 1.5mm but it is almost corrected n the dentist says my treatment is almost complete,my upper maxillary right canine was impacted n it was extracted by an inexperienced dentist when i was a child-n that was the cause of the midline shift and lead to class 2 malocclusion on one side and class 3 maloclussion on the other,my problem is that although my midline is correct there is still a space where the canine should hav been i feel that my teeth r gona shift back once the treatment is off,i am being treated with cross elastics in which the 1st runs from my 26 to 33, the 2nd from 23 to 43 and the 3rd from 13 to 46,plz suggest what should be done in this case and whether this treatment would become useless after sometime?,and whether my dentist is doing the right job?as im in 3rd yr of dentistry myself n im very worried about my teeth.thanku