Case 2: 12-year, 11-month-old boy, maxillary skeletal expander + facemask + full braces This patient presented with concerns of an underbite (Figs. 5a-5c). Our treatment plan included an MSE anchored with 4 TADs (BioMaterials Korea) connected to bands on the upper 6s, a facemask with arms running from the upper 6 bands, and braces on all erupted teeth (Figs. 6 and 7). The patient was instructed to turn the expander two times per day and to wear the facemask at night with 800 g (28 ounces) of force per Fig. 5a side. Additionally, the patient was instructed to wear 6-ounce elastics full time, running from the band hooks on the upper 6s to the hooks on the lower 3s. He completed his turns in six weeks, obtaining approximately 10.5 mm of expansion at the MSE screw (Figs. 8 and 9). He reported being very compliant with the facemask and intraoral elastics (Fig. 9). His superimpositions (Fig. 10a-10b) show that the transverse skeletal change (skeletal expansion) was 9.8 mm (4.9 mm per side) and his AP skeletal change was 2.9 mm. Fig. 7 The amount of dental compensation was significantly less in this case than in the non-TAD-anchored case. The amount of AP change was close to but slightly less than what was reported in the MARPE + facemask research referenced earlier. [Coronal superimposition videos posted with the digital version of this article at orthotown.com/magazine show the changes that occur within the nasal cavity and sinuses during expansion, which I found to be interesting because this view is not typically evaluated before and after treatment.] Fig. 10a Fig. 5b Fig. 5c Fig. 8 Fig. 10b Fig. 6a Fig. 6b Fig. 9 Fig. 6c NOVEMBER 2023 | 42 | ORTHOTOWN.COMhttps://www.orthotown.com/magazine/article/9126/marpe-mask http://www.ORTHOTOWN.COM