Severe Class II anterior deep bite malocclusion treated with a C-lingual retractor.
A C-lingual retractor was placed on the lingual aspects of the six maxillary anterior teeth in a 24-year-old female patient with a Class II anterior deep-bite malocclusion. The treatment plan consisted of extracting both the upper first premolars and intruding and retracting the upper six anterior teeth. Transpalatal arches were soldered to the upper first and second molar bands and used as an intra-arch anchor unit for upper space closure. Double NiTi closed coil springs were used palatally between the hooks of the C-lingual retractor and the transplantar arches. A high-pull headgear was used for anchorage reinforcement during en masse retraction. It took 14 months to treat this patient. The correct overbite and overjet was obtained by simultaneously intruding and retracting the upper six anterior teeth into their proper positions by C-lingual retractor mechanics, which contributed to an improvement in facial balance. The treatment result was stable 6 months after debonding. The application of this new appliance, consideration in case selection, and sequence of treatment are presented.
Kim
Seong-Hun
SH
Department of Orthodontics, The Catholic University of Korea, Uijongbu St Mary's Hospital, Uijongbu, South Korea. bravortho@hanmail.net
Park
Young-Guk
YG
Chung
Kyurhim
K
D000328:Adult; D005115:Extraoral Traction Appliances; D005260:Female; D006801:Humans; D008312:Malocclusion, Angle Class II / Q000628:therapy*; D016382:Orthodontic Appliance Design; D009967:Orthodontic Appliances; D019516:Orthodontic Space Closure; D009971:Orthodontics, Corrective / Q000295:instrumentation* / Q000379:methods; D014081:Tooth Extraction