Class II correction with the Cantilever Bite Jumper.
OBJECTIVE
To identify the skeletal, dentoalveolar, and soft tissue changes that occur during Class II correction with the Cantilever Bite Jumper (CBJ).


METHODS
This prospective cephalometric study was conducted on 26 subjects with Class II division 1 malocclusion treated with the CBJ appliance. A comparison was made with 26 untreated subjects with Class II malocclusion. Lateral head films from before and after CBJ therapy were analyzed through conventional cephalometric and Johnston analyses.


RESULTS
Class II correction was accomplished by means of 2.9 mm apical base change, 1.5 mm distal movement of the maxillary molars, and 1.1 mm mesial movement of the mandibular molars. The CBJ exhibited good control of the vertical dimension. The main side effect of the CBJ is that the vertical force vectors of the telescope act as lever arms and can produce mesial tipping of the mandibular molars.


CONCLUSIONS
The Cantilever Bite Jumper corrects Class II malocclusions with similar percentages of skeletal and dentoalveolar effects.
Moro
Alexandre
A
Department of Orthodontics, Federal University of Parana, Brazil. alexandremoro@uol.com.br
Janson
Guilherme
G
de Freitas
Marcos Roberto
MR
Henriques
José Fernando Castanha
JF
Petrelli
Nicolau Eros
NE
Lauris
José Pereira
JP
D000202:Activator Appliances; D000293:Adolescent; D002508:Cephalometry; D002648:Child; D002680:Chin / Q000473:pathology; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008312:Malocclusion, Angle Class II / Q000628:therapy*; D008334:Mandible / Q000473:pathology; D008437:Maxilla / Q000473:pathology; D008963:Molar / Q000473:pathology; D009666:Nose / Q000473:pathology; D016382:Orthodontic Appliance Design; D017289:Orthodontic Appliances, Functional; D011446:Prospective Studies; D019227:Tooth Apex / Q000473:pathology; D014087:Tooth Movement Techniques / Q000295:instrumentation; D014716:Vertical Dimension