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Article: Condylar growth and mandibular positioning with stepwise vs maximum advancement

TitleCondylar growth and mandibular positioning with stepwise vs maximum advancement
Authors
Issue Date2008
PublisherMosby, Inc. The Journal's web site is located at http://www.elsevier.com/locate/ajodo
Citation
American Journal Of Orthodontics And Dentofacial Orthopedics, 2008, v. 134 n. 4, p. 525-536 How to Cite?
AbstractIntroduction: The aim of this study was to compare the effects of several Class II malocclusion treatments on condylar growth and positioning of the mandible. Methods: The material comprised series of lateral cephalograms obtained at the start, after about 6 months, and after about 12 months of treatment from 3 groups of consecutively treated patients who used a headgear-activator with stepwise mandibular advancement (HGA-S), a headgear-activator with maximum jumping of the mandible (HGA-M), and a headgear-Herbst appliance with stepwise advancement (HGH-S), respectively. Six-month growth data from matched controls were used to calculate the net treatment effects. Results: Mandibular prognathism was enhanced after stepwise advancement but not after maximum jumping, and only during the initial phase of therapy; the effect was significantly greater for the fixed functional appliance than for the removable functional appliance. Lower-facial height was increased by the HGA-S, unchanged by the HGA-M, and restrained by the HGH-S. The low construction bite of the HGH-S meant that the extent of bone apposition on the posterior and superior parts of the condyle was similar, whereas the high construction bite of the HGA-S and the HGA-M meant that the effect on the superior part was greater, but only significantly so after stepwise advancement. Conclusions: The mode of jumping, the vertical opening, and whether the functional appliance is fixed or removable affect the amount and pattern of condylar growth, and the position of the mandible. © 2008 American Association of Orthodontists.
Persistent Identifierhttp://hdl.handle.net/10722/154543
ISSN
2015 Impact Factor: 1.69
2015 SCImago Journal Rankings: 1.249
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHägg, Uen_HK
dc.contributor.authorRabie, ABMen_HK
dc.contributor.authorBendeus, Men_HK
dc.contributor.authorWong, RWKen_HK
dc.contributor.authorWey, MCen_HK
dc.contributor.authorDu, Xen_HK
dc.contributor.authorPeng, Jen_HK
dc.date.accessioned2012-08-08T08:26:05Z-
dc.date.available2012-08-08T08:26:05Z-
dc.date.issued2008en_HK
dc.identifier.citationAmerican Journal Of Orthodontics And Dentofacial Orthopedics, 2008, v. 134 n. 4, p. 525-536en_HK
dc.identifier.issn0889-5406en_HK
dc.identifier.urihttp://hdl.handle.net/10722/154543-
dc.description.abstractIntroduction: The aim of this study was to compare the effects of several Class II malocclusion treatments on condylar growth and positioning of the mandible. Methods: The material comprised series of lateral cephalograms obtained at the start, after about 6 months, and after about 12 months of treatment from 3 groups of consecutively treated patients who used a headgear-activator with stepwise mandibular advancement (HGA-S), a headgear-activator with maximum jumping of the mandible (HGA-M), and a headgear-Herbst appliance with stepwise advancement (HGH-S), respectively. Six-month growth data from matched controls were used to calculate the net treatment effects. Results: Mandibular prognathism was enhanced after stepwise advancement but not after maximum jumping, and only during the initial phase of therapy; the effect was significantly greater for the fixed functional appliance than for the removable functional appliance. Lower-facial height was increased by the HGA-S, unchanged by the HGA-M, and restrained by the HGH-S. The low construction bite of the HGH-S meant that the extent of bone apposition on the posterior and superior parts of the condyle was similar, whereas the high construction bite of the HGA-S and the HGA-M meant that the effect on the superior part was greater, but only significantly so after stepwise advancement. Conclusions: The mode of jumping, the vertical opening, and whether the functional appliance is fixed or removable affect the amount and pattern of condylar growth, and the position of the mandible. © 2008 American Association of Orthodontists.en_HK
dc.languageengen_US
dc.publisherMosby, Inc. The Journal's web site is located at http://www.elsevier.com/locate/ajodoen_HK
dc.relation.ispartofAmerican Journal of Orthodontics and Dentofacial Orthopedicsen_HK
dc.rightsAmerican Journal of Orthodontics and Dentofacial Orthopedics. Copyright © Mosby, Inc.-
dc.subject.meshAdolescenten_US
dc.subject.meshCephalometry - Statistics & Numerical Dataen_US
dc.subject.meshChilden_US
dc.subject.meshExtraoral Traction Appliancesen_US
dc.subject.meshFemaleen_US
dc.subject.meshHumansen_US
dc.subject.meshMaleen_US
dc.subject.meshMalocclusion, Angle Class Ii - Therapyen_US
dc.subject.meshMandible - Physiologyen_US
dc.subject.meshMandibular Advancement - Instrumentation - Methodsen_US
dc.subject.meshMandibular Condyle - Growth & Developmenten_US
dc.subject.meshOrthodontic Appliances, Functionalen_US
dc.subject.meshProspective Studiesen_US
dc.subject.meshTreatment Outcomeen_US
dc.titleCondylar growth and mandibular positioning with stepwise vs maximum advancementen_HK
dc.typeArticleen_HK
dc.identifier.emailHägg, U: euohagg@hkusua.hku.hken_HK
dc.identifier.emailRabie, ABM: rabie@hku.hken_HK
dc.identifier.emailWong, RWK: fyoung@hku.hken_HK
dc.identifier.authorityHägg, U=rp00020en_HK
dc.identifier.authorityRabie, ABM=rp00029en_HK
dc.identifier.authorityWong, RWK=rp00038en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.ajodo.2006.09.064en_HK
dc.identifier.pmid18929270-
dc.identifier.scopuseid_2-s2.0-53049101770en_HK
dc.identifier.hkuros153920-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-53049101770&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume134en_HK
dc.identifier.issue4en_HK
dc.identifier.spage525en_HK
dc.identifier.epage536en_HK
dc.identifier.isiWOS:000260112000017-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridHägg, U=7006790279en_HK
dc.identifier.scopusauthoridRabie, ABM=7007172734en_HK
dc.identifier.scopusauthoridBendeus, M=6506522941en_HK
dc.identifier.scopusauthoridWong, RWK=7402127170en_HK
dc.identifier.scopusauthoridWey, MC=20735994400en_HK
dc.identifier.scopusauthoridDu, X=7402551294en_HK
dc.identifier.scopusauthoridPeng, J=25121598800en_HK

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