| Three-dimensional assessment of mandibular and glenoid fossa changes after bone-anchored Class III intermaxillary traction. | |
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MedLine Citation:
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PMID: 22748987 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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INTRODUCTION: Conventional treatment for young Class III patients involves extraoral devices designed to either protract the maxilla or restrain mandibular growth. The use of skeletal anchorage offers a promising alternative to obtain orthopedic results with fewer dental compensations. Our aim was to evaluate 3-dimensional changes in the mandibles and the glenoid fossae of Class III patients treated with bone-anchored maxillary protraction. METHODS: Twenty-five consecutive skeletal Class III patients between the ages of 9 and 13 years (mean age, 11.10 ± 1.1 year) were treated with Class III intermaxillary elastics and bilateral miniplates (2 in the infrazygomatic crests of the maxilla and 2 in the anterior mandible). The patients had cone-beam computed tomography images taken before initial loading and at the end of active treatment. Three-dimensional models were generated from these images, registered on the anterior cranial base, and analyzed by using color maps. RESULTS: Posterior displacement of the mandible at the end of treatment was observed in all subjects (posterior ramus: mean, 2.74 ± 1.36 mm; condyles: mean, 2.07 ± 1.16 mm; chin: mean, -0.13 ± 2.89 mm). Remodeling of the glenoid fossa at the anterior eminence (mean, 1.38 ± 1.03 mm) and bone resorption at the posterior wall (mean, -1.34 ± 0.6 mm) were observed in most patients. CONCLUSIONS: This new treatment approach offers a promising alternative to restrain mandibular growth for Class III patients with a component of mandibular prognathism or to compensate for maxillary deficiency in patients with hypoplasia of the midface. Future studies with long-term follow-up and comparisons with facemask and chincup therapies are needed to better understand the treatment effects. |
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Authors:
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Hugo De Clerck; Tung Nguyen; Leonardo Koerich de Paula; Lucia Cevidanes |
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Publication Detail:
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Type: Journal Article |
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: 142 ISSN: 1097-6752 ISO Abbreviation: Am J Orthod Dentofacial Orthop Publication Date: 2012 Jul |
Date Detail:
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Created Date: 2012-07-03 Completed Date: 2012-09-25 Revised Date: 2013-04-18 |
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: 25-31 Citation Subset: D; IM |
Copyright Information:
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Copyright © 2012 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved. |
Affiliation:
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Department of Orthodontics, School of Dentistry, University of North Carolina, Chapel Hill, NC, USA. hugo.declerck@skynet.be |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Bone Plates Bone Remodeling / physiology Bone Resorption / pathology Cephalometry / methods* Child Chin / pathology Cone-Beam Computed Tomography / methods Female Humans Image Processing, Computer-Assisted / methods Imaging, Three-Dimensional / methods* Male Malocclusion, Angle Class III / therapy* Mandible / pathology* Mandibular Condyle / pathology Maxilla / pathology Orthodontic Anchorage Procedures / instrumentation, methods* Orthodontic Appliances Prospective Studies Temporal Bone / pathology* Traction / instrumentation User-Computer Interface |
| Grant Support | |
ID/Acronym/Agency:
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R01 DE005215/DE/NIDCR NIH HHS |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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