| Short-term and long-term treatment outcomes with the FR-3 appliance of Fränkel. | |
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MedLine Citation:
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PMID: 18929269 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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INTRODUCTION: The aim of this retrospective controlled investigation was to analyze the short-term and long-term skeletal and dentoalveolar treatment outcomes of Function Regulator 3 (FR-3) therapy. METHODS: A group of 32 subjects with Class III malocclusion treated with the FR-3 appliance of Fränkel was compared with untreated Class III controls. The first observation was prepubertal, and the long-term observation was postpubertal for all subjects. Treatment consisted of full-time wear of the appliance for about 2.5 years, followed by a retention phase with the same appliance for at least 3 years. The overall observation period was 9 years 2 months. All patients showed a good level of compliance. Active treatment and posttreatment cephalometric changes were evaluated statistically with Mann-Whitney U tests. RESULTS: The FR-3 sample showed significant improvements in both maxillary size and position. No significant reduction in the increase of total mandibular length was recorded, but significant closures of both the gonial angle and the mandibular plane angle were found. Intermaxillary and interdental changes produced in the craniofacial skeleton were maintained successfully through the pubertal growth spurt. CONCLUSIONS: Long-term results of FR-3 therapy in patients with good compliance consisted of significant maxillary modifications and induced changes in mandibular morphology. Long-term appliance wear (more than 5 years) should be emphasized when considering treatment outcomes. |
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Authors:
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Alyssa S Levin; James A McNamara; Lorenzo Franchi; Tiziano Baccetti; Christine Fränkel |
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Publication Detail:
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Type: Evaluation Studies; 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: 134 ISSN: 1097-6752 ISO Abbreviation: Am J Orthod Dentofacial Orthop Publication Date: 2008 Oct |
Date Detail:
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Created Date: 2008-10-20 Completed Date: 2008-11-05 Revised Date: - |
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: 513-24 Citation Subset: D; IM |
Affiliation:
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Department of Orthodontics, University of Michigan, Ann Arbor, Michigan, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Cephalometry
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statistics & numerical data Child Child, Preschool Female Humans Longitudinal Studies Male Malocclusion, Angle Class III / therapy* Mandible / anatomy & histology* Maxilla / growth & development* Orthodontic Appliances, Functional* Orthodontics, Interceptive / instrumentation* Puberty Retrospective Studies Statistics, Nonparametric |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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