Comparisons of Adhesive Thickness Uniformity and Shear Bond Strength Between Specially Designed Brackets and Conventional Brackets PDF Download
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Author: Natalie Capan
Publisher:
ISBN:
Category : Dental bonding
Languages : en
Pages : 36
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Book Description
Author: Natalie Capan
Publisher:
ISBN:
Category : Dental bonding
Languages : en
Pages : 36
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Book Description
Author: Rodney G. Northrup
Publisher:
ISBN:
Category : Dental adhesives
Languages : en
Pages : 80
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Book Description
Author: Jennifer M. Messenger
Publisher:
ISBN:
Category : Brackets
Languages : en
Pages : 176
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Book Description
Author: Siriwan Kuntharaporn
Publisher:
ISBN:
Category : Thesis
Languages : en
Pages : 146
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Book Description
Author: Yung-Jeng Song
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN:
Category : Orthodontic appliances
Languages : en
Pages : 180
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Book Description
Author: Boyd O. Whitlock
Publisher:
ISBN:
Category :
Languages : en
Pages : 120
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Book Description
The purpose of this study was to compare the bond strengths of three adhesive systems (two-paste, no-mix, and one light-activated) when used alone and combined with a porcelain priming agent to bond ceramic brackets to porcelain surfaces. Sixty porcelain specimens were randomly assigned to the six different treatment groups. One half of the groups were bonded with the porcelain priming agent and one of the adhesive systems and the other half with one of the adhesive systems without the priming agent. The shear bond strengths, expressed in megapascals (MPa), of all specimens were tested, using an Instron testing machine, 10 minutes after being bonded. The surface of the porcelain and the bracket base were examined, using the scanning electron microscope (SEM), to determine the bond failure patterns and check the prcelain surface for the presence of cracks and fractures. Across the three different adhesive systems, mean shear bond strength measurements ranged from 6.3-7.5 MPa when the porcelain primer was used and from 1.8-3.8 when the porcelain primer was not used. There was a statistically significant difference within each adhesive between those samples with the priming agent (mean shear bond strength of 6.5 ± 0.8, 7.5 ± 1.0, and 6.3 ± 1.2) and those without the priming agent (mean shear bond strength of 3.8 ± 0.4, 1.8 ± 1.8, nad 2.6 ± 1.3) (p ≤ 0.5). Differences between the three adhesives were not statistically significant (p ≤ .05). Evaluation of the bond failure sites, using the SEM, revealed failures at the porcelain-adhesive interface, within the adhesive and at the bracket-adhseive interface for the porcelain primer samples. The samples that were bonded with the different adhesives only displayed a failure exclusively at the porcelain-adhesive interface. The failure patterns were verified by qualitative energy dispersive x-ray analysis (EDS). It can be concluded from this study that using any of the three adhesive systems combined with the porcelain priming agent will provide sufficient bond strength to withstand normal orthodontic forces and not damage the surface of the porcelain when debonded.
Author: Shilpa Jamenis
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659256783
Category :
Languages : en
Pages : 96
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Book Description
This study was carried out to evaluate and compare the shear bond strengths between the orthodontic bracket and acid etched enamel, enamel treated with self-etch primer and laser irradiated enamel and to analyze the interface of the enamel bracket bond.It will help students, teachers and othodontia practitioners as it deals with the most contemporarily used bonding techniques. The results indicate that the shear bond strength of all the three groups was clinically acceptable with no significant difference between them but more adhesive was left on enamel treated with acid and laser as compared to self-etch primer treated enamel.
Author: Patrick B. Rickheim
Publisher:
ISBN:
Category :
Languages : en
Pages : 43
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Book Description
Author: Katherine D. Plunkett
Publisher:
ISBN:
Category :
Languages : en
Pages : 124
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Book Description
Author: John Michael Tilghman
Publisher:
ISBN:
Category :
Languages : en
Pages : 126
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Book Description
