6m DE F 8m GH I 10m JK L Treatment progression from 6 months, 8 months and 10 months. P 6m O 10m Q Occlusal view of treatment progression 6 months and 10 months. Fig. 3 13m The first phase of treatment will create spaces posteriorly to resolve the anterior crowd-ing. The coordinated arch development will coordinate the tooth movements of both arches in all three dimensions. In addition we will reeducate the soft tissue envelope to accept the new transverse dimension and maintain the lower incisor position in the “neutral zone”. Throughout treatment, we will continue to educate the patient in proper oral hygiene technique. RS T 16m U VW 20m XY Z 22m AA 40 July/August 2010 JAOS BB CC Treatment progression from 13 months, 16 months, 20 months and 22 months.