title: Orthodontic extrusion of the lower third molar with an orthodontic mini implant.
abstract: Neurologic changes owing to damage to the inferior alveolar nerve (IAN) are the most serious complication of lower third molar (M3) extraction because of their close spatial relationship. We adopted the concept of regional orthodontic treatment and extrusion, using skeletal anchorage with an orthodontic mini implant. Two malformed M3s that were closely apposed to the IAN were extruded with the aid of 3 or 4 orthodontic brackets and a mini implant. Both of the M3s were extruded successfully. The patients experienced little discomfort with the orthodontic appliances and there was neither permanent neurologic damage nor fracture of the root fragments following subsequent M3 extraction. Orthodontic treatment using a miniscrew to separate the IAN and M3, or luxation of the M3 may be a good alternative treatment option for extrusion of a vertically impacted lower M3 with fragile roots.
authors.affiliation: Department of Advanced General Dentistry, College of Dentistry, Yonsei University, Seoul, Korea.
authors.forename: Wonse
authors.initials: W
authors.lastname: Park
authors.forename: Joon-Soo
authors.initials: JS
authors.lastname: Park
authors.forename: Yun-Mi
authors.initials: YM
authors.lastname: Kim
authors.forename: Hyung-Seog
authors.initials: HS
authors.lastname: Yu
authors.forename: Kee-Deog
authors.initials: KD
authors.lastname: Kim
mesh_terms: D000328:Adult; D001863:Bone Screws; D015921:Dental Implants; D005260:Female; D006801:Humans; D008334:Mandible; D008904:Miniaturization; D008964:Molar, Third; D052280:Orthodontic Anchorage Procedures / Q000295:instrumentation*; D050793:Orthodontic Extrusion / Q000295:instrumentation*; D014095:Tooth, Impacted / Q000628:therapy*
chemical_list: D015921:Dental Implants