Abstract
Purpose:
To evaluate the effect of bulk filling Class I posterior cavities on bonding to cavity-bottom dentin.
Materials and methods:
Two flowable "base" bulk-fill composites (Filtek Bulk Fill Flowable, SDR), one paste-like "full-body" bulk-fill composite (Tetric EvoCeram Bulk Fill) and one conventional paste-like composite (Filtek Z100) were bonded (G-ænial Bond) to either a flat surface (3.5 x 3.5 x 4 mm; C-factor: 0.18) or a Class I cavity (3.5 x 3.5 x 4 mm; C-factor: 5.8). After 1-week water storage, the restorations were sectioned to obtain 4 rectangular microspecimens that were subjected to microtensile bond strength (μTBS) testing.
Results:
No significant differences in μTBS were recorded between all composites when bonded onto a flat surface (p > 0.05). When bonded into a Class I cavity, the μTBS of all composites except SDR significantly decreased (p < 0.001).
Conclusion:
Both the configuration factor and the type of bulk-fill composite were found to have a great impact on bonding to cavity-bottom dentin.
Publication types
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Comparative Study
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Research Support, Non-U.S. Gov't
MeSH terms
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Bisphenol A-Glycidyl Methacrylate / chemistry
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Composite Resins / chemistry*
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Dental Bonding*
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Dental Cavity Preparation / classification*
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Dental Materials / chemistry*
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Dentin / ultrastructure
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Humans
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Light-Curing of Dental Adhesives
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Materials Testing
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Methacrylates / chemistry
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Polyethylene Glycols / chemistry
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Polymethacrylic Acids / chemistry
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Polyurethanes / chemistry
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Random Allocation
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Silicon Dioxide / chemistry
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Stress, Mechanical
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Surface Properties
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Tensile Strength
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Time Factors
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Tricarboxylic Acids / chemistry
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Viscosity
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Water / chemistry
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Zirconium / chemistry
Substances
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Composite Resins
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Dental Materials
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Methacrylates
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Polymethacrylic Acids
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Polyurethanes
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Tetric EvoCeram
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Tricarboxylic Acids
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Z100 composite resin
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Water
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urethane dimethacrylate luting resin
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triethylene glycol dimethacrylate
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Polyethylene Glycols
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ethoxylated bis-phenol A dimethacrylate
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Bisphenol A-Glycidyl Methacrylate
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4-methacryloxyethyltrimellitic acid
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Silicon Dioxide
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Zirconium