| Long-term soft-tissue response to orthodontic treatment with early cervical headgear--a randomized study. | |
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MedLine Citation:
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PMID: 19409341 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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INTRODUCTION: The purpose of this longitudinal randomized investigation was to determine the long-term changes in the soft-tissue profile during orthodontic treatment when treatment is started with headgear (HG) in the early mixed dentition. METHODS: The subjects were 68 children (28 girls, 40 boys; mean age, 7.6 years; SD, 0.3 years) with a Class II tendency in occlusion and moderate crowding. They were randomly divided into 2 groups. In the HG group, treatment began immediately. No other appliances were used during the first 2 years. In the control group, only minor interceptive procedures were performed during the first follow-up period of 2 years. During the 8-year follow-up, orthodontic treatment, if needed, comprised fixed appliances and possible extractions in both groups. Twenty linear and 5 angular soft-tissue measurements were registered from lateral cephalograms taken before treatment and after follow-up-periods of 2, 4, and 8 years. RESULTS: The major findings were that, at the 8-year follow-up, the soft-tissue chin and the lower lip were significantly thicker, and the mentolabial sulcus was significantly deeper in the HG group than in the control group. In the control group, a larger variation in the upper lip position was found because of more extractions in this group. CONCLUSIONS: Early HG treatment has only a minor effect on the soft-tissue profile. The main effects are on the thickness of the soft-tissue chin and the contour of the lower lip. The differences were not otherwise significant during the long-term follow-up. |
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Authors:
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Tarja Virkkula; Tuomo Kantomaa; Johanna Julku; Pertti Pirttiniemi |
Publication Detail:
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Type: Journal Article; 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: - |
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: 586-96 Citation Subset: D; IM |
Affiliation:
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Department of Orthodontics and Oral Development, Institute of Dentistry, University of Oulu, Oulu, Finland. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Cephalometry
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statistics & numerical data Child Chin / anatomy & histology* Dentition, Mixed Extraoral Traction Appliances* Female Follow-Up Studies Humans Lip / anatomy & histology* Longitudinal Studies Male Malocclusion, Angle Class II / therapy* Orthodontics, Corrective / instrumentation* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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