| Bonding orthodontic brackets to porcelain using different adhesives/enamel conditioners: a comparative study. | |
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MedLine Citation:
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PMID: 15794038 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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AIM: To evaluate the use of new adhesive/primer materials, including an experimental self-etch primer and a cyanocrylate adhesive, to enhance the shear strength of orthodontic brackets bonded to porcelain surfaces. MATERIAL AND METHODS: Sixty porcelain maxillary central incisor teeth were used. The teeth were randomly divided into four groups: group 1, teeth were etched with 37% phosphoric acid and the brackets were bonded with a composite adhesive; group 2, teeth were microetched, hydrofluoric acid and silane applied, and then the brackets were bonded with a composite adhesive; group 3, an acid-etch primer was used, then the brackets were bonded with the same composite adhesive as in the first 2 groups; group 4, teeth were etched with 35% phosphoric acid and the brackets were bonded with the cyanoacrylate adhesive. RESULTS: The analysis of variance comparing the groups tested (F = 9.446) indicated that there was a significant difference between the 4 groups. The cyanoacrylate adhesive had the lowest shear bond strength (mean = 1.7 +/- 2.1 MPa), followed by the conventional bonding using a 37% phosphoric acid etch and composite (mean = 2.1 +/- 1.2 MPa). The use of Transbond after microetching, with the application of hydrofluoric acid and silane, provided the highest shear bond strength (mean = 5.5 +/- 2.7 MPa). Transbond used with the acid etch-primer had a lower bond strength (mean = 3.8 +/- 2.5 MPa), but was not significantly different from the microetch/hydrofluoric acid/silane group. CONCLUSION: The results indicated that the use of a phosphoric acid etch with either a cyanoacrylate or composite adhesive to bond orthodontic brackets to porcelain surfaces produced significantly lower shear bond strength. Self-etch primers produced higher but less consistent shear bond strength for bonding orthodontic brackets. The most reliable bonding procedure to porcelain surfaces is through microetching with the use of hydrofluoric acid and a silane coupler before bonding, but this also produces the greatest damage to the porcelain surface. |
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Authors:
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Samir E Bishara; Raed Ajlouni; Charuphan Oonsombat; John Laffoon |
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Publication Detail:
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Type: Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial |
Journal Detail:
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Title: World journal of orthodontics Volume: 6 ISSN: 1530-5678 ISO Abbreviation: World J Orthod Publication Date: 2005 |
Date Detail:
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Created Date: 2005-03-29 Completed Date: 2005-04-20 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 100959981 Medline TA: World J Orthod Country: United States |
Other Details:
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Languages: eng Pagination: 17-24 Citation Subset: D; IM |
Affiliation:
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Department of Orthodontics, College of Dentistry, University of Iowa, 220 Dental Science S, Iowa City, IA 52242-1001, USA Linda-keller@uiowa.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acid Etching, Dental
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methods* Air Abrasion, Dental Bisphenol A-Glycidyl Methacrylate / chemistry Composite Resins / chemistry Cyanoacrylates / chemistry Dental Bonding* Dental Enamel Dental Porcelain / chemistry* Humans Hydrofluoric Acid / chemistry Materials Testing Orthodontic Brackets* Phosphoric Acids / chemistry Resin Cements / chemistry* Shear Strength Silanes / chemistry Stress, Mechanical Surface Properties |
| Chemical | |
Reg. No./Substance:
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0/Composite Resins; 0/Cyanoacrylates; 0/Phosphoric Acids; 0/Resin Cements; 0/Silanes; 0/Smartbond; 12001-21-7/Dental Porcelain; 135669-49-7/Transbond; 1565-94-2/Bisphenol A-Glycidyl Methacrylate; 7664-39-3/Hydrofluoric Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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