Fig. (3) Treatment progress (occlusal view). (A) Pretreatment crowded anterior mandibular segment. (B) Fixed appliances placed for a short period. (C) After aligning, access to interproximal areas is facilitated. (D) Interproximal enamel reduction is completed. (E) Further alignment improvement is achieved. (F) End of treatment, bonded lingual retainer in place.

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