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Abstract

Acute lymphoblastic leukemia (ALL) makes up approximately 75% to 80% of childhood leukemia. Longterm survivors through current medical management make orthodontic treatment available. However, the risk of these patients should be carefully evaluated. After the patient has completed all cancer therapy and has at least a 2-year event-free survival, orthodontic treatment can be started. Patients with ALL sometimes have to accept a compromised treatment result and finish the treatment earlier than normal due to the concerns of recurrence. To treat the maxillary canine-first premolar transposition require a lengthy treatment time. However, every effort should be made to bring the transposed canine back to its proper position in the dentition rather than to leave the canine in its transposed place. We present an ALL case with bilaterally transposed maxillary canines in an 11-year-old girl. She was in a well condition two years after chemotherapy. We started orthodontic correction by extracting her four first premolars, followed by comprehensive fixed orthodontic appliances, and finished within 17 months. No recurrence of leukemia was noted during these periods.

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