PMC5573496_01
Pretreatment extraoral and intraoral photographs.
jiufd-051-052-e001.jpg
PMC5573496_01_jiufd-051-052-e001.jpg
fig1
She had a symmetric face, incompetent lips, nonconsonant smile arch, low smile line,  convex profile, and retrusive lower lip and chin (Figure 1).
(A) pretreatment lateral cephalometric radiograph; (B) pretreatment panoramic radiograph; (C) posttreatment lateral cephalometric radiograph; (D) posttreatment panoramic radiograph.
jiufd-051-052-e002.jpg
PMC5573496_01_jiufd-051-052-e002.jpg
fig2
Table 1). The pretreatment panoramic  radiograph revealed that upper and lower third molars were present (Figure 2B).
(A) pretreatment;(B) initiation of intrusion; (C), achievement of satisfactory interdigitation.
jiufd-051-052-e003.jpg
PMC5573496_01_jiufd-051-052-e003.jpg
fig3
Before the treatment upper second molars were extracted to facilitate intrusion of maxillary posterior teeth and simultaneously two zygomatic miniplates were placed  on the right and left zygomatic buttress areas, then a modified acrylic cap slint Hyrax including bended "I" shaped processes was placed  (Figure 3A, Figure 3B). When the  satisfactory interdigitating was achieved (Figure 3C), fixed appliances were removed.
Posttreatment extraoral and intraoral photographs.
jiufd-051-052-e004.jpg
PMC5573496_01_jiufd-051-052-e004.jpg
fig4
Upper and lower canine-to-canine fixed  lingual retainers were placed for retention (Figure 4) and patient was referred for the removal of miniplates.