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dc.contributor.authorFleming, Padhraig Seamus
dc.identifier.citationFleming, P.S. 2013. An assessment of arch dimensional change with self-ligating brackets: systematic review and a randomised controlled trial. Queen Mary University of London.en_US
dc.description.abstractThe purposes of this study were to systematically review the evidence on the clinical use of self-ligating brackets (SLBs) and the validity of digital models, and to compare maxillary arch dimensional change during alignment with conventional brackets (CBs) and active or passive self-ligation in a clinical study. In the systematic reviews, multiple databases were searched, study selection, quality assessment and data extraction were performed, and meta-analyses conducted, where appropriate. In a laboratory study a technique to measure molar inclination change incorporating digital models was developed and validated. A multicentre, 3- arm parallel-group trial was conducted with 96 patients aged 16 and above randomly allocated into 3 equal groups (OvationTM, InOvationCTM or Damon QTM) and undergoing alignment with a DamonTM wire sequence for at least 34 weeks. Meta-analyses demonstrated no difference in arch dimensional changes between SLBs and CBs; however, a greater treatment time was found with self-ligation (2.2 months, 95% CI: 0.4, 3.98). The validity of direct measurement on digital models was confirmed in the other review, although meta-analysis was not possible. Complete data were obtained from 87 subjects in the trial. Bracket type had no significant effect on transverse dimensional changes with no difference in inter-molar width between passive self-ligation and CBs (0.32mm, 95% CI: -0.41, 1.05, p= 0.38) or active selfligation (0.4mm, 95% CI: -0.31, 1.11, p= 0.27). Incisor inclination changes with Damon QTM could not be differentiated from the conventional system (0.44 degrees, 95% CI: - 1.93, 2.8, p=0.71) or InOvationCTM (-0.22 degrees, 95% CI: -2.58, 2.14, p=0.85). Based on the systematic reviews, measurement of digital models is a valid alternative to plaster models, while little evidence to support the use of self-ligation was found. In the clinical trial no differences in arch dimensional changes during alignment between CBs and either active or passive self-ligation was found.en_US
dc.publisherQueen Mary University of London
dc.titleAn assessment of arch dimensional change with self-ligating brackets: systematic review and a randomised controlled trial.en_US
dc.rights.holderThe copyright of this thesis rests with the author and no quotation from it or information derived from it may be published without the prior written consent of the author

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