title: An unusual complication encountered during orthodontic treatment using a twin block appliance.
abstract: A case report is presented of a child who developed an unusual complication--lower centerline discrepancy--during Twin Block Appliance treatment due to posturing on the acrylic blocks.
authors.affiliation: Royal Bournemouth Hospital, Bournemouth, Dorset, UK.
authors.forename: Eleanor
authors.initials: E
authors.lastname: Thickett
authors.forename: Jeremy
authors.initials: J
authors.lastname: Hodgkins
mesh_terms: D000202:Activator Appliances; D000293:Adolescent; D002648:Child; D005146:Facial Asymmetry / Q000209:etiology*; D006801:Humans; D008297:Male; D008312:Malocclusion, Angle Class II / Q000150:complications / Q000628:therapy*; D024343:Open Bite / Q000209:etiology*; D017289:Orthodontic Appliances, Functional / Q000009:adverse effects*; D009971:Orthodontics, Corrective / Q000009:adverse effects* / Q000295:instrumentation; D016896:Treatment Outcome