| A randomized clinical trial of two alternative designs of Twin-block appliance. | |
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MedLine Citation:
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PMID: 22433323 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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OBJECTIVE: To test if placing a Southend clasp on the upper and lower incisors during Twin-block appliance treatment will control their angulation and enhance skeletal correction. DESIGN: Prospective, randomized, controlled clinical trial (ISRTCTN 45965219). SETTING: Orthodontic Department, Royal Preston District General Hospital, Preston, UK. PARTICIPANTS: Fifty-two consecutive patients aged 9-30 years undergoing treatment for Class II division 1 malocclusion (ANB>5°, OJ>6 mm). METHODS: Two alternative designs of Twin-block appliance were allocated randomly. One with a Southend clasp on the upper and lower central incisors and one without. The appliances were identical in all other aspects. OUTCOMES: Skeletal and dental changes measured on before and after treatment lateral cephalometric radiographs. RESULTS: There was a statistically significant change in ANB angle between the Southend group (-3·5°) and the Non-Southend group (-2·6°) (P = 0·004). The change in upper incisor angulation was -6·1° for the Southend group and -12·0° for the Non-Southend group, which was statistically significant (P = 0·005). The change in lower incisor angulation was 3·0° for the Southend group and 6·9° for the Non-Southend group, which was statistically significant (P = 0·005). CONCLUSIONS: The presence of a Southend clasp on the upper and lower incisors during Twin-block treatment limited their tipping which enhanced the skeletal correction. |
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Authors:
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Michael John Trenouth; Stephen Desmond |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of orthodontics Volume: 39 ISSN: 1465-3133 ISO Abbreviation: J Orthod Publication Date: 2012 Mar |
Date Detail:
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Created Date: 2012-03-21 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100957268 Medline TA: J Orthod Country: England |
Other Details:
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Languages: eng Pagination: 17-24 Citation Subset: D; IM |
Affiliation:
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Michael John Trenouth, Royal Preston Hospital Preston, Lancashire, UK. karen.pool@lthtr.nhs.uk. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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