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Bimaxillary Total Arch Intrusion in Lingual Orthodontics for Hyperdivergent Class II Face with Asymmetry and Lip Protrusion

 Ung Ki Cho  ;  Hui-Joo Seo  ;  Byeong-Tak Keum  ;  Kee-Joon Lee 
 Korean Journal of Lingual Orthodontics (대한설측교정학회지), Vol.9(1) : 6-13, 2020-12 
Journal Title
Korean Journal of Lingual Orthodontics(대한설측교정학회지)
Issue Date
Gummy smile ; Lip incompetency ; Total arch intrusion ; Anterior torque control
Hyperdivergent Class II face is accompanied by a convex profile, while it is usually characterized by upright upper and/
or lower incisors. Thus, it is important to precisely maintain an axis of upper incisors during retraction. Particularly,
axis control of upper incisors is more difficult in lingual orthodontics. Unlike in the buccal appliance, traction force
pushes the wire out of horizontal slot in the lingual appliance, so sufficient moment for torque control of incisors may
not be obtained. Therefore, excessive overtorque should be placed on the archwire for making same amount of moment
and accomplishing incisor translation. Furthermore, to correct lip protrusion and lip incompetency in this patient,
bimaxillary total arch intrusion and maximum retraction of incisors was also treatment objective to improve soft tissue
problems. This case report demonstrates satisfactory results through bimaxillary total arch intrusion with translation
of upper incisors and intrusion of lower incisors using palatal/lingual miniscrews and continuous arch with additional
torque for axis control of incisors in lingual orthodontics.
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Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Lee, Kee Joon(이기준) ORCID logo https://orcid.org/0000-0002-0782-3128
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