| Microtensile bond strength of photoactivated and autopolymerized adhesive systems to root dentin using translucent and opaque fiber-reinforced composite posts. | |
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MedLine Citation:
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PMID: 17394915 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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STATEMENT OF PROBLEM: The use of fiber-reinforced composite resin posts in endodontically treated teeth has increased. However, selecting an adhesive system that provides reliable and long-lasting bonding to root canal dentin remains difficult. PURPOSE: This study evaluated the microtensile bond strength of 2 adhesive systems to root dentin and 2 different fiber-reinforced composite resin posts. MATERIAL AND METHODS: Forty single-rooted teeth were instrumented, and root canals were prepared for translucent (Light Post [LP]) or opaque (Aestheti Post [AP]) quartz fiber-reinforced composite resin posts. Two adhesive systems were used: Scotchbond Multi-Purpose Plus (SBMP) (autopolymerized) as a control group, and Single Bond (SB) (photoactivated). Teeth were assigned to 4 groups (n=10): SBMP+LP, SBMP+AP, SB+LP, SB+AP. After post cementation, roots were perpendicularly sectioned into 1-mm-thick slices, which were trimmed to obtain dumbbell-shaped specimens. The specimens were divided into 3 regions: cervical (C), middle (M), and apical (A). To determine the bond strength, the bonding area of each specimen was calculated, and specimens were attached to a device to test microtensile strength at a crosshead speed of 1 mm/min. Data were analyzed using 3-way analysis of variance and the Tukey test (alpha=.05). Fractured specimens were examined under a x 25 stereomicroscope to determine the mode of fracture. RESULTS: There were significant differences only among root dentin regions (P<.001). The cervical third (9.16 +/- 1.18 MPa) presented higher mean bond strength values, especially for SBMP. Middle and apical regions demonstrated lower values (7.08 +/- 0.92 and 7.31 +/- 0.60 MPa, respectively). Adhesive and post main factors did not demonstrate significance. Also, no interaction was significant. No cohesive fractures within resin cement, fiber-reinforced composite resin post, or root dentin were identified. CONCLUSIONS: Both adhesive systems tested demonstrated reliable bonding when used with translucent and opaque fiber-reinforced composite posts. |
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Authors:
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Andre Mallmann; Leticia Borges Jacques; Luis Felipe Valandro; Antonio Muench |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of prosthetic dentistry Volume: 97 ISSN: 0022-3913 ISO Abbreviation: J Prosthet Dent Publication Date: 2007 Mar |
Date Detail:
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Created Date: 2007-03-30 Completed Date: 2007-05-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0376364 Medline TA: J Prosthet Dent Country: United States |
Other Details:
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Languages: eng Pagination: 165-72 Citation Subset: D; IM |
Affiliation:
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School of Dentistry, Bahiana Foundation for Science Development, Salvador, Bahia, Brazil. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Analysis of Variance Bisphenol A-Glycidyl Methacrylate / chemistry, radiation effects Cementation* Composite Resins* / chemistry Dental Stress Analysis Dentin-Bonding Agents* Humans Phase Transition Post and Core Technique* Quartz Resin Cements* / chemistry, radiation effects Tensile Strength |
| Chemical | |
Reg. No./Substance:
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0/Composite Resins; 0/Dentin-Bonding Agents; 0/Resin Cements; 0/Scotchbond Multi-Purpose Plus; 0/single bond; 14808-60-7/Quartz; 1565-94-2/Bisphenol A-Glycidyl Methacrylate |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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