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Article: Forward mandibular positioning enhances condylar adaptation in adult rats

TitleForward mandibular positioning enhances condylar adaptation in adult rats
Authors
Issue Date2004
PublisherOxford University Press. The Journal's web site is located at http://ejo.oxfordjournals.org/
Citation
European Journal Of Orthodontics, 2004, v. 26 n. 4, p. 353-358 How to Cite?
AbstractThe aim of this investigation was to assess quantitatively the adaptive changes in the condyles of adult rats to forward mandibular positioning. The level of types II and X collagen expressed in the condyles of adult rats was compared with that formed in response to forward mandibular positioning and the levels of expression were correlated to the amount of bone formed in response to mandibular advancement. Seventy-eight 120-day-old female Sprague-Dawley rats were included in this study. The rats were randomly allocated to six groups. Each group consisted of nine rats with bite-jumping devices and four untreated controls. The animals in each group were sacrificed on days 3, 7, 14, 21, 30, and 60. Immunostaining was used for the detection of types II and X collagen, while Alcian blue-PAS was used to observe the extracellular matrix and new bone formation. The results showed that new cartilage was formed in the posterior condyle. The highest level of expression of types II and X collagen were present on day 21, the amount of increase was 247.99 and 540.08 per cent, respectively. The highest level of new bone formation was measured at day 30 of advancement when the amount of increase in new bone formation was 318.91 per cent. These findings indicate that forward mandibular positioning causes changes in the biophysical environment of the temporomandibular joint (TMJ) of adult rats that leads to condylar adaptation. © European Orthodontic Society 2004; all rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/154548
ISSN
2015 Impact Factor: 1.44
2015 SCImago Journal Rankings: 1.090
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorRabie, ABMen_HK
dc.contributor.authorXiong, Hen_HK
dc.contributor.authorHägg, Uen_HK
dc.date.accessioned2012-08-08T08:26:06Z-
dc.date.available2012-08-08T08:26:06Z-
dc.date.issued2004en_HK
dc.identifier.citationEuropean Journal Of Orthodontics, 2004, v. 26 n. 4, p. 353-358en_HK
dc.identifier.issn0141-5387en_HK
dc.identifier.urihttp://hdl.handle.net/10722/154548-
dc.description.abstractThe aim of this investigation was to assess quantitatively the adaptive changes in the condyles of adult rats to forward mandibular positioning. The level of types II and X collagen expressed in the condyles of adult rats was compared with that formed in response to forward mandibular positioning and the levels of expression were correlated to the amount of bone formed in response to mandibular advancement. Seventy-eight 120-day-old female Sprague-Dawley rats were included in this study. The rats were randomly allocated to six groups. Each group consisted of nine rats with bite-jumping devices and four untreated controls. The animals in each group were sacrificed on days 3, 7, 14, 21, 30, and 60. Immunostaining was used for the detection of types II and X collagen, while Alcian blue-PAS was used to observe the extracellular matrix and new bone formation. The results showed that new cartilage was formed in the posterior condyle. The highest level of expression of types II and X collagen were present on day 21, the amount of increase was 247.99 and 540.08 per cent, respectively. The highest level of new bone formation was measured at day 30 of advancement when the amount of increase in new bone formation was 318.91 per cent. These findings indicate that forward mandibular positioning causes changes in the biophysical environment of the temporomandibular joint (TMJ) of adult rats that leads to condylar adaptation. © European Orthodontic Society 2004; all rights reserved.en_HK
dc.languageengen_US
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.-
dc.subject.meshAdaptation, Physiological - Physiologyen_US
dc.subject.meshAlcian Blue - Diagnostic Useen_US
dc.subject.meshAnimalsen_US
dc.subject.meshCartilage - Ultrastructureen_US
dc.subject.meshCollagen Type Ii - Analysisen_US
dc.subject.meshCollagen Type X - Analysisen_US
dc.subject.meshColoring Agents - Diagnostic Useen_US
dc.subject.meshExtracellular Matrix - Ultrastructureen_US
dc.subject.meshFemaleen_US
dc.subject.meshMandible - Anatomy & Histologyen_US
dc.subject.meshMandibular Advancement - Instrumentationen_US
dc.subject.meshMandibular Condyle - Metabolism - Physiologyen_US
dc.subject.meshOsteogenesis - Physiologyen_US
dc.subject.meshPeriodic Acid-Schiff Reactionen_US
dc.subject.meshRandom Allocationen_US
dc.subject.meshRatsen_US
dc.subject.meshRats, Sprague-Dawleyen_US
dc.subject.meshTemporomandibular Joint - Anatomy & Histologyen_US
dc.subject.meshTime Factorsen_US
dc.titleForward mandibular positioning enhances condylar adaptation in adult ratsen_HK
dc.typeArticleen_HK
dc.identifier.emailRabie, ABM: rabie@hku.hken_HK
dc.identifier.emailHägg, U: euohagg@hkusua.hku.hken_HK
dc.identifier.authorityRabie, ABM=rp00029en_HK
dc.identifier.authorityHägg, U=rp00020en_HK
dc.description.naturelink_to_OA_fulltexten_US
dc.identifier.doi10.1093/ejo/26.4.353en_HK
dc.identifier.pmid15366378-
dc.identifier.scopuseid_2-s2.0-5444260627en_HK
dc.identifier.hkuros95060-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-5444260627&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume26en_HK
dc.identifier.issue4en_HK
dc.identifier.spage353en_HK
dc.identifier.epage358en_HK
dc.identifier.isiWOS:000222997400001-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridRabie, ABM=7007172734en_HK
dc.identifier.scopusauthoridXiong, H=36852325600en_HK
dc.identifier.scopusauthoridHägg, U=7006790279en_HK

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