title: Treatment effects of the Jasper Jumper and the Bionator associated with fixed appliances.
abstract: BACKGROUND
  The aim of this study was to evaluate the effects of Class II malocclusion treatment with the Jasper Jumper and the Bionator, associated with fixed appliances.
  
  
  METHODS
  The sample comprised 77 young individuals divided into 3 groups: Group 1 consisted of 25 patients treated with the Jasper Jumper appliance associated with fixed appliances for a mean period of 2.15 years; group 2 had 30 patients, treated with the Bionator and fixed appliances, for a mean treatment time of 3.92 years; and the control group included 22 subjects followed for a mean period of 2.13 years. The initial and final lateral cephalograms of the patients were evaluated. Intergroup comparison at the initial stage and of the treatment changes were performed by analysis of variance.
  
  
  RESULTS
  Their effects consisted in a restrictive effect on the maxilla, a slight increase in anterior face height, retrusion and extrusion of the maxillary incisors, labial tipping and protrusion of the mandibular incisors in both groups and intrusion with the Jasper Jumper appliance, maxillary molar distalization with the Jasper Jumper, extrusion and mesialization of the mandibular molars, both appliances provided significant improvement of the maxillomandibular relationship, overjet, overbite and molar relationship.
  
  
  CONCLUSIONS
  The effects of both appliances in class II malocclusion treatment are similar; however, treatment with the Jasper Jumper was shorter than with the Bionator.
authors.affiliation: Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, Brazil. leniananeves@uol.com.br.
authors.forename: Leniana Santos
authors.initials: LS
authors.lastname: Neves
authors.affiliation: Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, Brazil. jansong@travelnet.com.br.
authors.forename: Guilherme
authors.initials: G
authors.lastname: Janson
authors.affiliation: Department of Orthodontics, Ingá Faculty, Rodovia PR 317, n° 6114, Maringá, PR, 87035-510, Brazil. rohercan@uol.com.br.
authors.forename: Rodrigo Hermont
authors.initials: RH
authors.lastname: Cançado
authors.affiliation: Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, Brazil. karina-lima@uol.com.br.
authors.forename: Karina Jerônimo Rodrigues Santiago
authors.initials: KJ
authors.lastname: de Lima
authors.affiliation: Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, Brazil. thaismmf@usp.br.
authors.forename: Thaís Maria Freire
authors.initials: TM
authors.lastname: Fernandes
authors.affiliation: Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, Brazil. jfchenri@fob.usp.br.
authors.forename: José Fernando Castanha
authors.initials: JF
authors.lastname: Henriques
mesh_terms: D000202:Activator Appliances; D000293:Adolescent; D002508:Cephalometry / Q000379:methods; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor / Q000473:pathology; D008297:Male; D008312:Malocclusion, Angle Class II / Q000628:therapy*; D008334:Mandible / Q000473:pathology; D008437:Maxilla / Q000473:pathology; D008963:Molar / Q000473:pathology; D009295:Nasal Bone / Q000473:pathology; D016382:Orthodontic Appliance Design; D057887:Overbite / Q000628:therapy; D012189:Retrospective Studies; D014087:Tooth Movement Techniques / Q000295:instrumentation*; D014716:Vertical Dimension
keywords: Activator appliances; Cephalometry; Orthodontic appliance design; Treatment outcome