| Efficiency of mandibular arch alignment with 2 preadjusted edgewise appliances. | |
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MedLine Citation:
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PMID: 19409342 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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INTRODUCTION: The aim of this study was to compare the efficiency of mandibular arch alignment in 3 dimensions with a self-ligating bracket system (SmartClip, 3M Unitek, Monrovia, Calif) and a conventional preadjusted edgewise twin bracket (Victory, 3M Unitek) in nonextraction patients. This was a prospective, randomized, controlled clinical trial at the Royal London Hospital, School of Dentistry, and Kent and Canterbury Hospital, United Kingdom. Sixty-six consecutive patients satisfying the inclusion criteria were enrolled in the study. They were randomly allocated with a computer-generated system to 1 of the 2 bracket systems. METHODS: Pretreatment mandibular arch irregularity was measured by using a coordinate measuring machine (Merlin II, International Metrology Systems, Gloucester, United Kingdom). A 0.016-in round martensitic active nickel-titanium aligning archwire (3M Unitek) was placed in all subjects. Mandibular arch irregularity was remeasured 8 weeks later. RESULTS: Sixty-five subjects completed the study. Bracket type had little influence on alignment efficiency overall (P = 0.08), or in the buccal (P = 0.173) or labial segments (P = 0.528) after adjustment for pretreatment differences by analysis of covariance (ANCOVA). Alignment efficiency was highly correlated to pretreatment irregularity overall (P <0.001), both in the buccal (P = 0.001) and labial (P <0.001) segments. Increasing age appeared to have a negative effect on alleviation of irregularity, although this effect did not reach statistical significance (P = 0.053). CONCLUSIONS: The null hypothesis that efficiency of alignment in the mandibular arch in nonextraction patients is independent of bracket type was accepted. Alignment efficiency is largely influenced by initial irregularity. |
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Authors:
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Padhraig S Fleming; Andrew T DiBiase; Grammati Sarri; Robert T Lee |
Publication Detail:
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Type: Journal Article; Multicenter Study; Randomized Controlled Trial |
Journal Detail:
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Title: American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics Volume: 135 ISSN: 1097-6752 ISO Abbreviation: Am J Orthod Dentofacial Orthop Publication Date: 2009 May |
Date Detail:
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Created Date: 2009-05-04 Completed Date: 2009-05-18 Revised Date: 2009-12-08 |
Medline Journal Info:
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Nlm Unique ID: 8610224 Medline TA: Am J Orthod Dentofacial Orthop Country: United States |
Other Details:
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Languages: eng Pagination: 597-602 Citation Subset: D; IM |
Affiliation:
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Orthodontic Department, Royal London Hospital, London, United Kingdom. padhraigfleming@hotmail.com |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Child Dental Arch / physiopathology* Double-Blind Method Female Humans Male Malocclusion / therapy* Mandible Orthodontic Appliance Design Orthodontic Brackets* Orthodontics, Corrective / instrumentation* Prospective Studies Treatment Outcome Young Adult |
| Comments/Corrections | |
Comment In:
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Am J Orthod Dentofacial Orthop. 2009 Dec;136(6):756-7
[PMID:
19962584
]
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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