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Article: Temporomandibular response to early and late removal of bite-jumping devices

TitleTemporomandibular response to early and late removal of bite-jumping devices
Authors
Issue Date2003
PublisherOxford University Press. The Journal's web site is located at http://ejo.oxfordjournals.org/
Citation
European Journal Of Orthodontics, 2003, v. 25 n. 5, p. 465-470 How to Cite?
AbstractThis study was designed to monitor the amount of bone formed after 'early' and 'late' removal of bite-jumping devices and to compare it with that of normal growth. One hundred and thirty-five 35-day-old female Sprague-Dawley rats were randomly divided into seven control (n = 5) and 10 experimental (n = 10) groups. Appliances were fitted to position the mandible forward in the experimental groups. On day 30, the bite-jumping device was removed in two groups ('early' removal) and the rats were sacrificed on days 44 and 60. On day 44 the device was removed in one group ('late' removal) and the rats were sacrificed on day 60. The full-time wear and matched control animals were then sacrificed at different time points. Tissue sections (7 μm) were cut through the temporomandibular joint (TMJ) in the sagittal plane and stained with periodic acid and Schiff's reagent for the evaluation of new bone formation. Newly formed bone was measured using a computer-assisted image analysing system. The results showed that, in the condyle, early removal of the appliance resulted in less bone formation when compared with that of natural growth. Late removal of the appliance resulted in bone formation similar to that of natural growth. In the glenoid fossa, the level of bone formation was similar to that of the control at early and late removal of the appliance. In conclusion, early appliance removal results in subnormal growth of the posterior condyle but not of the glenoid fossa. Increasing the length of mandibular advancement secures normal levels of mandibular growth in the post-treatment period. © European Orthodontic Society 2003; all rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/66409
ISSN
2015 Impact Factor: 1.44
2015 SCImago Journal Rankings: 1.090
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChayanupatkul, Aen_HK
dc.contributor.authorRabie, ABMen_HK
dc.contributor.authorHägg, Uen_HK
dc.date.accessioned2010-09-06T05:46:07Z-
dc.date.available2010-09-06T05:46:07Z-
dc.date.issued2003en_HK
dc.identifier.citationEuropean Journal Of Orthodontics, 2003, v. 25 n. 5, p. 465-470en_HK
dc.identifier.issn0141-5387en_HK
dc.identifier.urihttp://hdl.handle.net/10722/66409-
dc.description.abstractThis study was designed to monitor the amount of bone formed after 'early' and 'late' removal of bite-jumping devices and to compare it with that of normal growth. One hundred and thirty-five 35-day-old female Sprague-Dawley rats were randomly divided into seven control (n = 5) and 10 experimental (n = 10) groups. Appliances were fitted to position the mandible forward in the experimental groups. On day 30, the bite-jumping device was removed in two groups ('early' removal) and the rats were sacrificed on days 44 and 60. On day 44 the device was removed in one group ('late' removal) and the rats were sacrificed on day 60. The full-time wear and matched control animals were then sacrificed at different time points. Tissue sections (7 μm) were cut through the temporomandibular joint (TMJ) in the sagittal plane and stained with periodic acid and Schiff's reagent for the evaluation of new bone formation. Newly formed bone was measured using a computer-assisted image analysing system. The results showed that, in the condyle, early removal of the appliance resulted in less bone formation when compared with that of natural growth. Late removal of the appliance resulted in bone formation similar to that of natural growth. In the glenoid fossa, the level of bone formation was similar to that of the control at early and late removal of the appliance. In conclusion, early appliance removal results in subnormal growth of the posterior condyle but not of the glenoid fossa. Increasing the length of mandibular advancement secures normal levels of mandibular growth in the post-treatment period. © European Orthodontic Society 2003; all rights reserved.en_HK
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.subject.meshActivator Appliancesen_HK
dc.subject.meshAnimalsen_HK
dc.subject.meshFemaleen_HK
dc.subject.meshHumansen_HK
dc.subject.meshImage Processing, Computer-Assisteden_HK
dc.subject.meshMandibular Advancement - instrumentationen_HK
dc.subject.meshMandibular Condyle - growth & developmenten_HK
dc.subject.meshMaxillofacial Developmenten_HK
dc.subject.meshOsteogenesisen_HK
dc.subject.meshRatsen_HK
dc.subject.meshRats, Sprague-Dawleyen_HK
dc.subject.meshTemporomandibular Joint - growth & developmenten_HK
dc.subject.meshTime Factorsen_HK
dc.titleTemporomandibular response to early and late removal of bite-jumping devicesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0141-5387&volume=25 No5&spage=465&epage=470&date=2003&atitle=Temporomandibular+response+to+early+and+late+removal+of+bite-jumping+devicesen_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_subscribed_fulltext-
dc.identifier.doi10.1093/ejo/25.5.465en_HK
dc.identifier.pmid14609014-
dc.identifier.scopuseid_2-s2.0-0642276311en_HK
dc.identifier.hkuros84874en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0642276311&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume25en_HK
dc.identifier.issue5en_HK
dc.identifier.spage465en_HK
dc.identifier.epage470en_HK
dc.identifier.isiWOS:000185596800004-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridChayanupatkul, A=6506338362en_HK
dc.identifier.scopusauthoridRabie, ABM=7007172734en_HK
dc.identifier.scopusauthoridHägg, U=7006790279en_HK

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