Extraoral vs intraoral appliance for distal movement of maxillary first molars: a randomized controlled trial

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Extraoral vs intraoral appliance for distal movement of maxillary first molars: a randomized controlled trial

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dc.contributor.author Bondemark, Lars
dc.contributor.author Karlsson, Ingela
dc.date.accessioned 2006-10-25T16:19:44Z
dc.date.available 2006-10-25T16:19:44Z
dc.date.issued 2005
dc.identifier.issn 0003-3219
dc.identifier.uri http://hdl.handle.net/2043/3013
dc.description.abstract Using randomized controlled trial methodology, the aim of this study was to evaluate and compare the treatment effects of an extraoral appliance (EOA) and an intraoral appliance (IOA) for distal movement of maxillary first molars. A total of 40 patients (mean 11.5 years, SD 1.29) at the Orthodontic Clinic, National Health Service, Skane County Council, Malmö, Sweden, were randomized to receive treatment with either extraoral traction (cervical headgear) or an IOA us-ing superelastic coils for distal movement of maxillary first molars. The inclusion criteria were a nonextraction treatment plan, a Class II molar relationship and maxillary first molars in occlusion with no erupted maxillary second molars. The outcome measures to be assessed in the trial were treatment time, cephalometric analysis of distal molar movement, anterior movement of maxillary central incisors, ie, anchorage loss and sagittal and vertical skeletal positional changes of the maxilla and mandible. In the IOA group, the molars were distalized during an average time of 5.2 months, whereas in the EOA group the corresponding time was 6.4 months (P < .01). The mean amount of distal molar movement was significantly higher in the IOA than in the EOA group, three mm vs 1.7 mm (P < .001). Moderate anchorage loss was produced with the IOA implying increased overjet (0.9 mm) whereas the EOA created decreased overjet (0.9 mm). It can be concluded that the IOA was more effective than the EOA to create distal movement of the maxillary first molars. en
dc.format.extent 8
dc.language.iso eng en
dc.subject.classification Humanities/Social Sciences en
dc.title Extraoral vs intraoral appliance for distal movement of maxillary first molars: a randomized controlled trial en
dc.type Article, other scientific en
dc.identifier.paperprint 0 en
dc.contributor.department Malmö University. Faculty of Odontology en
dc.subject.srsc Research Subject Categories::ODONTOLOGY
dc.relation.ispartofpublication Angle orthodontist;5 en
dc.relation.ispartofpublicationvolume 75 en
dc.format.ePage 706
dc.format.sPage 699
mahlocal.rights.oaType gold
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