Case Report Treatment Results With a total treatment time of 25 months, the treatment objectives were mostly achieved with excellent esthetic and functional results. Posttreatment photographs and digital study casts showed a stable Class I occlusion. The crowding was resolved, and the open bite was closed (Figures 7 and 8). The posttreatment panoramic radiograph showed corrected root parallelism without any obvious root resorption or other pathologies (Figure 9). The cephalometric measurements and the superimposition tracing indicated a marginal improvement of Class III skeletal pattern (Wits from −5.0 mm to −2.1 mm, ANB from 0.2° to 1.0°) and clockwise rotation and remodeling of the mandible (SNB from 77.2° to 75.4°). The overjet was improved primarily by the proclination of the maxillary incisor. The lower incisors that were retroclined already at pretreatment were even more retroclined (IMPA from 86.9° to 85.4°) with CL III elastics and without placing any additional labial crown torque, but the result was acceptable with 2.2 mm of overjet and 1.6 mm of overbite. A slight increase in both upper and lower lip protrusion was noted (upper lip by +0.6 mm and lower lip by +1.7 mm), improving the patient's profile (Figures 9 and 10; Table 2). With expansion of the maxillary arch (mostly dental expansion) and arch coordination, the posterior crossbite at UR4 and 5 was relieved. The ABO cast radiograph evaluation score was 19 (Figure 11). Figure 7. Posttreatment facial and intraoral photographs (14 years, 3 months) Figure 8. Posttreatment digital study models (14 years, 4 months) Although the angulation of the retroclined lower incisor could have been improved with interproximal reduction, addition of labial Figure 9. Posttreatment panoramic radiograph and lateral cephalogram Winter 2021 PCSO Bulletin 45