| Age-related long-term posttreatment occlusal and arch changes. | |
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MedLine Citation:
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PMID: 19905848 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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ABSTRACT Objective: To evaluate differences in long-term postretention changes between adolescents and adults. Materials and Methods: The sample included 96 subjects, 51 adolescents and 45 adults (14.2 +/- 0.8 and 21.5 +/- 6.8 years of age, respectively, at the end of treatment) retained for 3 years and followed approximately 16 years post treatment, who were randomly selected from two private practices. Prior to treatment, 38 and 58 had Class I and Class II malocclusions, respectively. Results: With the exception of adult midlines, all of the occlusal variables (overjet [0.50-0.77 mm], overbite [0.85-0.95 mm], the maxillary incisor irregularity [0.69-0.80 mm], the mandibular incisor irregularity [0.85-1.50 mm] and the PAR score [0.86-1.92 points]) showed significant increases over time. Adolescents consistently showed greater increases of the occlusal variables than adults, with mandibular incisor irregularity and the PAR index attaining statistically significant (P < .05) levels. Arch length and mandibular intercanine width showed statistically significant decreases over time in both groups; maxillary intercanine and intermolar widths did not change significantly. Overjet increased significantly more in Class II patients than in Class I patients, whereas Class I patients showed significantly greater decreases in mandibular intermolar width than Class II patients. Conclusions: Over the 16-year posttreatment period, adolescents showed significantly greater increases in mandibular incisor irregularity, and the PAR index than adults. Treated Class I patients demonstrated less increase in overjet and greater decreases in mandibular intermolar width than Class II patients. |
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Authors:
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Hyunjung Park; Jim C Boley; Richard A Alexander; Peter H Buschang |
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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: 0003-3219 ISO Abbreviation: Angle Orthod Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2009-11-12 Completed Date: - 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: 247-53 Citation Subset: D; IM |
Affiliation:
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a Research Scientist, Department of Orthodontics, Baylor College of Dentistry, Dallas, Tex. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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