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Related Concept Videos

X-ray Imaging01:24

X-ray Imaging

11.0K
German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
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Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials
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Evaluation of Radiopacity of Bulk-fill Flowable Composites Using Digital Radiography.

B Tarcin, B Gumru, S Peker

    Operative Dentistry
    |April 6, 2016
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    Summary
    This summary is machine-generated.

    New bulk-fill flowable composites offer enhanced radiopacity, meeting ISO standards for dental restorations. These materials demonstrate superior radiopacity compared to enamel, dentin, and conventional flowable composites.

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    Area of Science:

    • Dental Materials Science
    • Radiology
    • Restorative Dentistry

    Background:

    • Bulk-fill flowable composites are used as a base layer for posterior composite restorations, allowing for thicker application (up to 4 mm).
    • Sufficient radiopacity is a critical performance requirement for these materials to ensure adequate visualization on radiographs.

    Purpose of the Study:

    • To evaluate and compare the radiopacity of bulk-fill flowable composites against conventional flowable composites using digital imaging.
    • To determine if the tested bulk-fill materials meet the minimum radiopacity standards set by the International Standards Organization.

    Main Methods:

    • Ten specimens (5 mm diameter, 1 mm thickness) of four bulk-fill and nine conventional flowable composites were prepared.
    • Radiographs were captured using a digital imaging system with a storage phosphor plate, dental x-ray unit (70 kVp, 8 mA, 0.2s), tooth slices, and an aluminum step wedge.
    • Radiopacity was quantified as equivalent aluminum thickness by measuring gray values using histogram software.

    Main Results:

    • All tested bulk-fill flowable composites exhibited significantly higher radiopacity than enamel, dentin, and most conventional flowable composites (p<0.05).
    • Venus Bulk Fill (Heraeus Kulzer) showed the highest radiopacity, while Arabesk Flow (Voco) had the lowest.
    • The radiopacity order for bulk-fill composites was: Venus Bulk Fill ≥ X-tra Base > SDR ≥ Filtek Bulk Fill.

    Conclusions:

    • The bulk-fill flowable restorative materials evaluated in this study meet the minimum radiopacity standards defined by the International Standards Organization.
    • These findings support the use of bulk-fill flowable composites as a reliable base material in posterior composite restorations due to their adequate radiopacity.