| Changes in temporomandibular joint disc position and form following Herbst and fixed orthodontic treatment. | |
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MedLine Citation:
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PMID: 20578854 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: To determine the changes in the position and form of the temporomandibular joint articular disc in adolescents with Class II division 1 malocclusion and mandibular retrognathism treated with the Herbst appliance (phase I) and fixed orthodontic appliance (phase II). MATERIALS AND METHODS: Thirty-two consecutive adolescents went through phase I of treatment and 23 completed phase II. The temporomandibular joints were evaluated qualitatively by means of magnetic resonance images at the beginning of treatment (T1), during phase I (T2), at the end of phase I (T3), and at the end of phase II (T4). RESULTS: Significant changes in disc position were not observed with the mouth closed between T1 x T3 (P = .317), T3 x T4 (P = .287), or T1 x T4 (P = .261). At T2, on average, the disc was positioned regressively. With the mouth open, no difference was observed between T1 x T3 (P = .223) or T1 x T4 (P = .082). We did observe a significant difference between T3 x T4 (P < .05). Significant changes in the disc form were found with the mouth closed between T1 x T2 (P < .001) and T2 x T3 (P < .001). CONCLUSIONS: At the end of the two-phase treatment, in general terms, the position and form of the initial articular discs were maintained; however, in some temporomandibular joints some seemingly adverse effects were observed at T4. |
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Authors:
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Luís Antônio de Arruda Aidar; Gladys Cristina Dominguez; Hélio K Yamashita; Márcio Abrahão |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Angle orthodontist Volume: 80 ISSN: 1945-7103 ISO Abbreviation: Angle Orthod Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-06-28 Completed Date: 2010-09-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370550 Medline TA: Angle Orthod Country: United States |
Other Details:
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Languages: eng Pagination: 843-52 Citation Subset: D; IM |
Affiliation:
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Department of Orthodontics, Santa Cecília University, Santos, São Paulo, Brazil. luisaidar@uol.com.br |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Child Female Follow-Up Studies Humans Magnetic Resonance Imaging Male Malocclusion, Angle Class II / therapy* Mandibular Condyle / pathology Orthodontic Appliance Design Orthodontic Appliances* Orthodontic Appliances, Functional* Orthodontic Brackets Palatal Expansion Technique / instrumentation Prospective Studies Retrognathism / therapy* Temporal Bone / pathology Temporomandibular Joint / pathology Temporomandibular Joint Disk / pathology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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