File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Timing for effective application of anteriorly directed orthopedic force to the maxilla

TitleTiming for effective application of anteriorly directed orthopedic force to the maxilla
Authors
Issue Date1997
PublisherMosby, Inc. The Journal's web site is located at http://www.elsevier.com/locate/ajodo
Citation
American Journal of Orthodontics and Dentofacial Orthopedics, 1997, v. 112 n. 3, p. 292-299 How to Cite?
AbstractClass III malocclusion with retrusive maxilla can be orthopedically corrected in the deciduous and mixed dentition, with reverse-pull headgear in combination with rapid palatal expansion. The literature recommends this procedure be carried out before the patient is 8 years old to obtain the optimal orthopedic result. This statement, however, has not been supported by scientific data. The current study examined the treatment effects of patients younger than 8 years old (5 to 8 years) and patients older than 8 years old (9 to 12 years). Thirty patients treated with maxillary protraction and expansion in the Department of Children's Dentistry and Orthodontics, University of Hong Kong were included in this study. Cephalometric radiographs were taken 6 months before the initiation of treatment (T(0)), at the initiation of treatment (T1), and after 6 months of treatment (T2). In this way, (T(2)-T1) represented cephalometric changes during the treatment period and (T1-T0) represented 6 months of growth changes without treatment. Experimental subjects served as their own control in this study. A grid system consisting of maxillary occlusal plane (OL) and a line perpendicular to OL through sella (OLp) was used for linear measurements. A total of 15 linear and 3 angular cephalometric measurements were made. A multivariate analysis of variance (MANOVA), which used age and treatment time as its factors, was used to determine effect of age and/or treatment on each cephalometric parameter. Results indicated strikingly similar therapeutic response between the younger and older age groups. These data suggest that similar skeletal response can be obtained when maxillary protraction was started either before age 8 (5 to 8 years) or after age 8 years (8 to 12 years).
Persistent Identifierhttp://hdl.handle.net/10722/154001
ISSN
2015 Impact Factor: 1.69
2015 SCImago Journal Rankings: 1.249
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorMerwin, Den_US
dc.contributor.authorNgan, Pen_US
dc.contributor.authorHagg, Uen_US
dc.contributor.authorYiu, Cen_US
dc.contributor.authorWei, SHYen_US
dc.date.accessioned2012-08-08T08:22:45Z-
dc.date.available2012-08-08T08:22:45Z-
dc.date.issued1997en_US
dc.identifier.citationAmerican Journal of Orthodontics and Dentofacial Orthopedics, 1997, v. 112 n. 3, p. 292-299en_US
dc.identifier.issn0889-5406en_US
dc.identifier.urihttp://hdl.handle.net/10722/154001-
dc.description.abstractClass III malocclusion with retrusive maxilla can be orthopedically corrected in the deciduous and mixed dentition, with reverse-pull headgear in combination with rapid palatal expansion. The literature recommends this procedure be carried out before the patient is 8 years old to obtain the optimal orthopedic result. This statement, however, has not been supported by scientific data. The current study examined the treatment effects of patients younger than 8 years old (5 to 8 years) and patients older than 8 years old (9 to 12 years). Thirty patients treated with maxillary protraction and expansion in the Department of Children's Dentistry and Orthodontics, University of Hong Kong were included in this study. Cephalometric radiographs were taken 6 months before the initiation of treatment (T(0)), at the initiation of treatment (T1), and after 6 months of treatment (T2). In this way, (T(2)-T1) represented cephalometric changes during the treatment period and (T1-T0) represented 6 months of growth changes without treatment. Experimental subjects served as their own control in this study. A grid system consisting of maxillary occlusal plane (OL) and a line perpendicular to OL through sella (OLp) was used for linear measurements. A total of 15 linear and 3 angular cephalometric measurements were made. A multivariate analysis of variance (MANOVA), which used age and treatment time as its factors, was used to determine effect of age and/or treatment on each cephalometric parameter. Results indicated strikingly similar therapeutic response between the younger and older age groups. These data suggest that similar skeletal response can be obtained when maxillary protraction was started either before age 8 (5 to 8 years) or after age 8 years (8 to 12 years).en_US
dc.languageengen_US
dc.publisherMosby, Inc. The Journal's web site is located at http://www.elsevier.com/locate/ajodoen_US
dc.relation.ispartofAmerican Journal of Orthodontics and Dentofacial Orthopedicsen_US
dc.rightsAmerican Journal of Orthodontics and Dentofacial Orthopedics. Copyright © Mosby, Inc.-
dc.subject.meshAgingen_US
dc.subject.meshAnalysis Of Varianceen_US
dc.subject.meshCephalometry - Statistics & Numerical Dataen_US
dc.subject.meshChilden_US
dc.subject.meshChild, Preschoolen_US
dc.subject.meshDentition, Mixeden_US
dc.subject.meshExtraoral Traction Appliances - Statistics & Numerical Dataen_US
dc.subject.meshFemaleen_US
dc.subject.meshHumansen_US
dc.subject.meshMaleen_US
dc.subject.meshMalocclusion, Angle Class Iii - Physiopathology - Radiography - Therapyen_US
dc.subject.meshMaxilla - Growth & Development - Radiographyen_US
dc.subject.meshTime Factorsen_US
dc.subject.meshVertical Dimensionen_US
dc.titleTiming for effective application of anteriorly directed orthopedic force to the maxillaen_US
dc.typeArticleen_US
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0889-5406&volume=112&issue=3&spage=292&epage=299&date=1998&atitle=Timing+for+effective+application+of+anteriorly+directed+orthopedic+force+to+the+maxilla-
dc.identifier.emailHagg, U: euohagg@hku.hken_US
dc.identifier.emailYiu, C: ckyyiu@hkucc.hku.hken_US
dc.identifier.emailWei, SHY: cdowei@hkuxa.hku.hk-
dc.identifier.authorityHagg, U=rp00020en_US
dc.identifier.authorityYiu, C=rp00018en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/S0889-5406(97)70259-2-
dc.identifier.pmid9294359en_US
dc.identifier.scopuseid_2-s2.0-0031228302en_US
dc.identifier.hkuros29790-
dc.identifier.volume112en_US
dc.identifier.issue3en_US
dc.identifier.spage292en_US
dc.identifier.epage299en_US
dc.identifier.isiWOS:A1997XV07600014-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridMerwin, D=16683389900en_US
dc.identifier.scopusauthoridNgan, P=7006250823en_US
dc.identifier.scopusauthoridHagg, U=7006790279en_US
dc.identifier.scopusauthoridYiu, C=7007115156en_US
dc.identifier.scopusauthoridWei, SH=7401765260en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats