In Vitro Tensile Bond Strength Comparison of Two Ceramic Brackets Utilizing Three Adhesive Filler Concentrations PDF Download
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Author: Thomas Joseph Weber
Publisher:
ISBN:
Category : Dental adhesives
Languages : en
Pages :
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Author: Thomas Joseph Weber
Publisher:
ISBN:
Category : Dental adhesives
Languages : en
Pages :
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Author: Alan James Ostertag
Publisher:
ISBN:
Category : Dental adhesives
Languages : en
Pages : 134
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Author: Paul Raymond Ostertag
Publisher:
ISBN:
Category : Dental bonding
Languages : en
Pages : 132
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Author: Kristian Eric Hyer
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ISBN:
Category : Dental bonding
Languages : en
Pages : 230
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Author:
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ISBN:
Category : Medicine
Languages : en
Pages : 1484
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Author: Boyd O. Whitlock
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Category :
Languages : en
Pages : 120
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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: V. A. James Buzzitta
Publisher:
ISBN:
Category : Dental bonding
Languages : en
Pages : 150
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Author: Lucila Guerrero de Pulido
Publisher:
ISBN:
Category : Dental bonding
Languages : en
Pages : 128
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Author: Donald P. Wolfert
Publisher:
ISBN:
Category : Dental adhesives
Languages : en
Pages : 126
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Author: Kirk Tristan Ripley
Publisher:
ISBN:
Category : Orthodontic appliances
Languages : en
Pages : 218
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