Fig. 1 Fig. 3 Fig. 2 Fig. 4 Fig. 5 to treat the midline with elastics, knowing that the midline would start to the left and to the right to get the best fit of the teeth without exacerbating the root resorption on the lower right premolar. One thing to note is the foreshortening of the roots from the fi rst treatment. To minimize tooth movement and maximize tooth correction, I decided to remove #28. Although #29 had more root resorption, I felt #29 ultimately would experience less movement if I extracted #28. My hope was that removing #28 would expose #29 to less of an opportunity for root resorption. I was in favor of clear aligner therapy. I can increase my aligner case selection when I add augmentive tools such as MOPs and VPro. The patient needed fewer office visits because of his restrictive schedule, so it was the perfect match. After three months, we were ready to remove the expander (Fig. 4) and braces (Fig. 5), take full diagnostic records for clear aligner therapy and plan a significant change in occlusion for this challenging problem. There was a significant change in the transverse relationship of the molar teeth after the NiTi expander with MOPs. No further damage was noted to the permanent teeth. The prediction indicated a significant change in torque of the anterior teeth, as well as a bodily movement of multiple teeth to control a change in the midline. I used the Clarity Aligner system from 3M Oral Care, because I thought the longer tray design and stiffer material would help me maintain control as I uprighted the lower teeth and translated them to the right to close an extraction space. The case required FREE FACTS, circle 37 on card orthotown.com \\ JULY/AUGUST 2020 OT0720_Warshawsky_Acceleration_MM.indd 25 25 7/14/20 10:02 AMhttp://easyrxcloud.com http://www.orthotown.com