title: Posterior impaction with orthodontic miniscrews for openbite closure and improvement of facial profile.
abstract: Skeletal anterior open bite is often caused by posterior dentoalveolar excess and downward and backward mandibular rotation. Orthodontic miniscrews can successfully impact the posterior dentition, allowing for open-bite correction through upward and forward mandibular autorotation. An Asian male, 27 years of age, with a Class II skeletal relationship, dolichocephalic facial type, high mandibular plane angle, 4.0-mm anterior open bite, and convex soft-tissue profile was treated with 4 dentoalveolar orthodontic miniscrews. The maxillary first and second molars were impacted 1.4 mm, resulting in open-bite closure, 2. 1 degrees of upward and forward mandibular autorotation, 2.0-mm advancement of pogonion, 3.5-degree reduction in soft-tissue facial convexity, and 2.6-mm increase in anteroposterior pharyngeal dimension on the lateral cephalogram. This case report demonstrates successful treatment with orthodontic miniscrews in open-bite closure with Class II correction, without extraction or surgically positioned miniplates. Miniscrew-supported posterior impaction and mandibular autorotation may become a viable treatment alternative to surgery in patients desiring improvement in their excessive dentofacial vertical dimension and facial esthetics.
authors.affiliation: Department of Orthodontics, University of Illinois at Chicago, Chicago, Illinois, USA. neal_kravitz@yahoo.com
authors.forename: Neal D
authors.initials: ND
authors.lastname: Kravitz
authors.forename: Budi
authors.initials: B
authors.lastname: Kusnoto
mesh_terms: D000328:Adult; D001863:Bone Screws; D002508:Cephalometry; D005145:Face / Q000033:anatomy & histology; D006801:Humans; D008297:Male; D008312:Malocclusion, Angle Class II / Q000628:therapy*; D024343:Open Bite / Q000628:therapy*; D052280:Orthodontic Anchorage Procedures / Q000295:instrumentation / Q000379:methods*; D009967:Orthodontic Appliances; D009971:Orthodontics, Corrective / Q000295:instrumentation / Q000379:methods*; D014095:Tooth, Impacted / Q000628:therapy; D014716:Vertical Dimension