title: Severe anterior open bite with mandibular retrusion treated with multiloop edgewise archwires and microimplant anchorage complemented by genioplasty.
abstract: In this case report, we introduce the combined use of multiloop edgewise archwire and microimplant anchorage to treat an 18-year-old Chinese woman who had a severe anterior open bite and a retrusive chin. Her diagnosis included a skeletal Class II base with severe anterior open bite, backward rotated mandible, and mesially tipped buccal dentition. The treatment plan emphasized vertical control of the posterior dentoalveolar dimension. Microimplant anchors were placed in the mandibular buccal segment to provide rigid anchorage and deliver intruding forces to the posterior teeth; a multiloop edgewise archwire was applied to generate uprighting forces to the maxillary and mandibular posterior teeth. Intrusion and uprighting of the posterior teeth contributed to the counterclockwise rotation of the mandibular plane, which consequently contributed to the facial profile improvement. Orthognathic genioplasty was implemented to further improve the chin prominence. After 1.5 years of retention, ideal intercuspation was evident, and the improved facial contour was stable.
authors.affiliation: Postgraduate student, Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, Shanghai, China.
authors.forename: Ziqing
authors.initials: Z
authors.lastname: Xu
authors.affiliation: Assistant professor, Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, Shanghai, China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Hu
authors.affiliation: Professor, Department of Oral and Maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, Shanghai, China.
authors.forename: Xudong
authors.initials: X
authors.lastname: Wang
authors.affiliation: Chair, Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, Shanghai, China. Electronic address: orthoshengang@gmail.com.
authors.forename: Gang
authors.initials: G
authors.lastname: Shen
mesh_terms: D000293:Adolescent; D002508:Cephalometry / Q000379:methods; D015921:Dental Implants; D005260:Female; D005500:Follow-Up Studies; D063172:Genioplasty / Q000379:methods*; D006801:Humans; D008312:Malocclusion, Angle Class II / Q000601:surgery / Q000628:therapy; D008334:Mandible / Q000473:pathology* / Q000601:surgery; D008904:Miniaturization; D024343:Open Bite / Q000601:surgery / Q000628:therapy*; D052280:Orthodontic Anchorage Procedures / Q000295:instrumentation*; D016382:Orthodontic Appliance Design; D009969:Orthodontic Wires; D010347:Patient Care Planning; D063173:Retrognathia / Q000628:therapy; D012399:Rotation; D014087:Tooth Movement Techniques / Q000295:instrumentation*; D016896:Treatment Outcome; D014716:Vertical Dimension
chemical_list: D015921:Dental Implants