Fig. 2 Fig. 4a Case 1: 8-year, 3-month-old girl, bonded RPE + facemask This patient presented with concerns of dental crowding and a narrow upper jaw (Figs. 1a-1c). Our treatment plan included a traditional bonded RPE (Fig. 2) and a protraction facemask. She was instructed to turn the RPE once per day for a total of 40 turns (8 mm of expansion at the screw) and to wear the facemask at night with 400 g (14 ounces) force per side. She completed the turns on schedule and wore her facemask for a total of 3.5 months (Figs. 3a-3c) Her superimpositions (Figs. 4a-4c) show that the transverse skeletal changes (skeletal expansion) was 4.7 mm (2.35 mm per side) and her AP skeletal change was 1.3 mm, which is consistent with the expected changes for the number of turns completed and the amount of time the facemask was worn. Fig. 1a Fig. 3a Fig. 4b Fig. 4c Fig. 3b Fig. 3c Fig. 1b Fig. 1c NOVEMBER 2023 | 41 | ORTHOTOWN.COMhttp://www.ORTHOTOWN.COM