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Conference Paper: Is there a Vertical 'Price' for Correction of a Class II Malocclusion?

TitleIs there a Vertical 'Price' for Correction of a Class II Malocclusion?
Authors
Issue Date2004
PublisherOxford University Press. The Journal's web site is located at http://ejo.oxfordjournals.org/
Citation
The 80th Congress of European Orthodontic Society, Aarhus, Denmark, 7-11 June 2004. In European Journal of Orthodontics, 2004, v. 26 n. 5, p. e31-e32 Abstract no.62 How to Cite?
AbstractAIM: The amount of growth any individual can be expected to grow may or may not depend on the particular form of treatment (Johnston, 1999). The aim of this study was to investigate vertical skeletal changes during treatment of a Class II malocclusion with various orthodontic devices. SUBJECTS AND METHOD: (1) Fixed appliance group: 18 consecutive subjects treated non-extraction and Class II elastics, and (2) Headgear-functional appliance group: 22 consecutive subjects treated with Headgear-Herbst with step-by-step advancement of the mandible followed by a headgear-activator as a retainer. Lateral cephalograms were obtained at the start of treatment (T0), and after 6 (T6), 12 (T12) and 18 (T18) months. LFH (Me to Sp') and mandibular plane angle (NSL/ML) were estimated. RESULTS: The growth changes over 6 months in millimetres were: LFH +1.8*** and NSL/ML 0.0. For group 1 LFH and NSL/ML changed 3.1***/1.5* at T6; 4.2***/1.3*.at T12, and 5.0***/1.0* at T18. For group 2 the corresponding figures were 2.2**/0.1, 2.7***/–0.6*, and 2.7***/–1.1*, respectively. There was a statistically significant difference for both cephalometric variables between the two treatment groups at all occasions, except for LFH at T6 (P < 0.07). CONCLUSION: With orthodontic treatment of Class II malocclusions the change in the vertical dimension is affected in various ways with different orthodontic device, varying from good control of the vertical dimension to a significant price in lengthening of the face and opening of the mandibular plane angle.
Persistent Identifierhttp://hdl.handle.net/10722/94599
ISSN
2015 Impact Factor: 1.44
2015 SCImago Journal Rankings: 1.090

 

DC FieldValueLanguage
dc.contributor.authorHagg, EUOen_HK
dc.contributor.authorRabie, ABMen_HK
dc.contributor.authorNelson, Ben_HK
dc.date.accessioned2010-09-25T15:36:12Z-
dc.date.available2010-09-25T15:36:12Z-
dc.date.issued2004en_HK
dc.identifier.citationThe 80th Congress of European Orthodontic Society, Aarhus, Denmark, 7-11 June 2004. In European Journal of Orthodontics, 2004, v. 26 n. 5, p. e31-e32 Abstract no.62en_HK
dc.identifier.issn0141-5387en_HK
dc.identifier.urihttp://hdl.handle.net/10722/94599-
dc.description.abstractAIM: The amount of growth any individual can be expected to grow may or may not depend on the particular form of treatment (Johnston, 1999). The aim of this study was to investigate vertical skeletal changes during treatment of a Class II malocclusion with various orthodontic devices. SUBJECTS AND METHOD: (1) Fixed appliance group: 18 consecutive subjects treated non-extraction and Class II elastics, and (2) Headgear-functional appliance group: 22 consecutive subjects treated with Headgear-Herbst with step-by-step advancement of the mandible followed by a headgear-activator as a retainer. Lateral cephalograms were obtained at the start of treatment (T0), and after 6 (T6), 12 (T12) and 18 (T18) months. LFH (Me to Sp') and mandibular plane angle (NSL/ML) were estimated. RESULTS: The growth changes over 6 months in millimetres were: LFH +1.8*** and NSL/ML 0.0. For group 1 LFH and NSL/ML changed 3.1***/1.5* at T6; 4.2***/1.3*.at T12, and 5.0***/1.0* at T18. For group 2 the corresponding figures were 2.2**/0.1, 2.7***/–0.6*, and 2.7***/–1.1*, respectively. There was a statistically significant difference for both cephalometric variables between the two treatment groups at all occasions, except for LFH at T6 (P < 0.07). CONCLUSION: With orthodontic treatment of Class II malocclusions the change in the vertical dimension is affected in various ways with different orthodontic device, varying from good control of the vertical dimension to a significant price in lengthening of the face and opening of the mandibular plane angle.-
dc.languageengen_HK
dc.publisherOxford University Press. The Journal's web site is located at http://ejo.oxfordjournals.org/en_HK
dc.relation.ispartofEuropean Journal of Orthodonticsen_HK
dc.rightsEuropean Journal of Orthodontics. Copyright © Oxford University Press.en_HK
dc.titleIs there a Vertical 'Price' for Correction of a Class II Malocclusion?en_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0141-5387&volume=26&spage=No. 62, page e31&epage=&date=2004&atitle=Is+there+a+Vertical+%27Price%27+for+Correction+of+a+Class+II+Malocclusion?en_HK
dc.identifier.emailHagg, EUO: euohagg@hkusua.hku.hken_HK
dc.identifier.emailRabie, ABM: rabie@hkusua.hku.hken_HK
dc.identifier.authorityHagg, EUO=rp00020en_HK
dc.identifier.authorityRabie, ABM=rp00029en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1093/ejo/26.5.e1-
dc.identifier.hkuros109973en_HK
dc.identifier.volume26en_HK

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