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Article: Muscular adaptation to gradual advancement of the mandible

TitleMuscular adaptation to gradual advancement of the mandible
Authors
Issue Date2003
PublisherE H Angle Education and Research Foundation, Inc. The Journal's web site is located at http://www.angle.org/
Citation
Angle Orthodontist, 2003, v. 73 n. 5, p. 525-531 How to Cite?
AbstractMuscular activity of the superficial masseter muscle and anterior portion of the temporal muscle before, during, and after treatment, with gradual advancement of the mandible, was evaluated by assessing the average integrated electromyogram (EMG) with the mandible in retruded position (RP) and incisal edge-to-edge (EE) position on 23 consecutive subjects with skeletal Class II malocclusion. Toward the end of active treatment and follow-up, the RP position and EE position coincided. At any given registration, the EMG activity of the masseter muscle was at least twice (P < .001) that of the anterior portion of the temporal muscle. The EMG activity in RP for the anterior portion of the temporal muscle was not affected significantly, whereas the EMG activity at EE position decreased significantly (P < .05) during the initial treatment, but, thereafter, it increased continuously. The difference in EMG activity between six months of follow-up and pretreatment level reached statistical significance (P < .05). For the masseter muscle, the EMG activity at both RP and EE position was reduced about 20% during the initial treatment but returned to the pretreatment level during active treatment and exceeded pretreatment level by approximately 30% to 50% at two and six months of follow-up, respectively. In conclusion, it seemed that gradual advancement affected the anterior portion of the temporal muscle to a minor extent, whereas the effect on the masseter muscle was significant.
Persistent Identifierhttp://hdl.handle.net/10722/66727
ISSN
2015 Impact Factor: 1.579
2015 SCImago Journal Rankings: 1.254
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorDu, Xen_HK
dc.contributor.authorHägg, Uen_HK
dc.date.accessioned2010-09-06T05:48:49Z-
dc.date.available2010-09-06T05:48:49Z-
dc.date.issued2003en_HK
dc.identifier.citationAngle Orthodontist, 2003, v. 73 n. 5, p. 525-531en_HK
dc.identifier.issn0003-3219en_HK
dc.identifier.urihttp://hdl.handle.net/10722/66727-
dc.description.abstractMuscular activity of the superficial masseter muscle and anterior portion of the temporal muscle before, during, and after treatment, with gradual advancement of the mandible, was evaluated by assessing the average integrated electromyogram (EMG) with the mandible in retruded position (RP) and incisal edge-to-edge (EE) position on 23 consecutive subjects with skeletal Class II malocclusion. Toward the end of active treatment and follow-up, the RP position and EE position coincided. At any given registration, the EMG activity of the masseter muscle was at least twice (P < .001) that of the anterior portion of the temporal muscle. The EMG activity in RP for the anterior portion of the temporal muscle was not affected significantly, whereas the EMG activity at EE position decreased significantly (P < .05) during the initial treatment, but, thereafter, it increased continuously. The difference in EMG activity between six months of follow-up and pretreatment level reached statistical significance (P < .05). For the masseter muscle, the EMG activity at both RP and EE position was reduced about 20% during the initial treatment but returned to the pretreatment level during active treatment and exceeded pretreatment level by approximately 30% to 50% at two and six months of follow-up, respectively. In conclusion, it seemed that gradual advancement affected the anterior portion of the temporal muscle to a minor extent, whereas the effect on the masseter muscle was significant.en_HK
dc.languageengen_HK
dc.publisherE H Angle Education and Research Foundation, Inc. The Journal's web site is located at http://www.angle.org/en_HK
dc.relation.ispartofAngle Orthodontisten_HK
dc.subject.meshAdaptation, Physiologicalen_HK
dc.subject.meshAdolescenten_HK
dc.subject.meshBite Forceen_HK
dc.subject.meshDental Occlusion, Centricen_HK
dc.subject.meshElectromyographyen_HK
dc.subject.meshExtraoral Traction Appliancesen_HK
dc.subject.meshFemaleen_HK
dc.subject.meshFollow-Up Studiesen_HK
dc.subject.meshHumansen_HK
dc.subject.meshIsometric Contraction - physiologyen_HK
dc.subject.meshMaleen_HK
dc.subject.meshMalocclusion, Angle Class II - therapyen_HK
dc.subject.meshMandibular Advancementen_HK
dc.subject.meshMasseter Muscle - physiopathologyen_HK
dc.subject.meshOrthodontic Appliances, Functionalen_HK
dc.subject.meshTemporal Muscle - physiopathologyen_HK
dc.titleMuscular adaptation to gradual advancement of the mandibleen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0003-3219&volume=73 No5&spage=525&epage=531&date=2003&atitle=Muscular+Adaptation+to+Gradual+Advancement+of+the+Mandible+en_HK
dc.identifier.emailHägg, U:euohagg@hkusua.hku.hken_HK
dc.identifier.authorityHägg, U=rp00020en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.pmid14580019-
dc.identifier.scopuseid_2-s2.0-0642371536en_HK
dc.identifier.hkuros85354en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0642371536&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume73en_HK
dc.identifier.issue5en_HK
dc.identifier.spage525en_HK
dc.identifier.epage531en_HK
dc.identifier.isiWOS:000185748700011-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridDu, X=7402551294en_HK
dc.identifier.scopusauthoridHägg, U=7006790279en_HK

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