case_images: PMC4745967_01
case_images: Pretreatment intraoral photographs, radiographs, and cephalometric tracing.
case_images: CRID2016-6010615.001.jpg
case_images: PMC4745967_01_CRID2016-6010615.001.jpg
case_images: fig1
case_images: Class II division 1 malocclusion, overjet of 9.0 mm, and AOB of 4.0 mm. Constricted maxillary arch, slight diastema between the maxillary incisors and between the lower central incisors, and a slight midline deviation to the left were also present (Figure 1). The absence of second maxillary premolars was detected in the panoramic radiograph (Figure 1).
case_images: The expander before and after fixation. Thumb sucking position.
case_images: CRID2016-6010615.002.jpg
case_images: PMC4745967_01_CRID2016-6010615.002.jpg
case_images: fig2
case_images: Progress after 3 weeks of palatal expansion. The appliance work as "reminder" and serve to curb the habit.
case_images: CRID2016-6010615.003.jpg
case_images: PMC4745967_01_CRID2016-6010615.003.jpg
case_images: fig3
case_images: A fixed Haas-type appliance for RPE was planned and fixed in order to achieve palatal expansion and serve as a "reminder" to curb the habit and indirectly promote the closure of the anterior open bite (Figure 3).
case_images: Postexpansion intraoral photographs, radiographs, and cephalometric superimposition. Black, initial; blue, final.
case_images: CRID2016-6010615.004.jpg
case_images: PMC4745967_01_CRID2016-6010615.004.jpg
case_images: fig4
case_images: Orthodontic treatment was started with the fixation of the palatal device to the first molars and bonding on the palatal surfaces of the molars and deciduous canines (Figure 4).
case_images: Nine months after removal of the palatal expander and no thumb sucking habit.
case_images: CRID2016-6010615.005.jpg
case_images: PMC4745967_01_CRID2016-6010615.005.jpg
case_images: fig5
case_images: During the first weeks of use of a palatal expander and in the subsequent months in the retention phase, the patient stopped her habit and the spontaneous correction of AOB was observed (Figure 5).
case_images: 18 months after removal of palatal expander appliance. Relapse of the anterior open bite due to relapse of the thumb sucking habit. Callus on the right thumb observed.
case_images: CRID2016-6010615.006.jpg
case_images: PMC4745967_01_CRID2016-6010615.006.jpg
case_images: fig6
case_images: However, some months after the removal of the Haas-type palatal expander, the relapse of the habit was observed (Figure 6).