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New finishing instruments for composite resins.

F Lutz, J C Setcos, R W Phillips

    Journal of the American Dental Association (1939)
    |October 1, 1983
    PubMed
    Summary
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    New diamond finishing burs effectively smooth composite resin restorations, causing less damage than traditional instruments. Clinical results are promising, suggesting improved dental restorative techniques.

    Area of Science:

    • Dental Materials Science
    • Restorative Dentistry
    • Biomaterials Engineering

    Background:

    • Composite resin restorations require precise finishing for optimal function and aesthetics.
    • Existing finishing instruments, like aluminum oxide disks, have limitations on concave and occlusal surfaces.
    • Conventional rigid rotary instruments (stones, tungsten carbide burs) are ineffective with microfilled composite systems.

    Purpose of the Study:

    • To evaluate the effectiveness of novel diamond-coated finishing burs for composite resin restorations.
    • To compare the surface quality and damage caused by diamond burs versus conventional instruments.

    Main Methods:

    • Evaluation of 40- and 15-micron diamond-coated finishing burs on composite resins.
    • Surface roughness measurements.

    Related Experiment Videos

  • Qualitative and quantitative Scanning Electron Microscopy (SEM) evaluations.

    • Main Results:

    • Fine and superfine diamond finishing burs produced composite resin surfaces as smooth as tungsten carbide burs and stones.
    • Diamond burs caused significantly less surface and subsurface damage and marginal fractures.
    • Three-year clinical experience with diamond burs was generally favorable.

    Conclusions:

    • Diamond-coated finishing burs are effective for precise finishing of composite resin restorations, including difficult surfaces.
    • These burs offer a superior alternative to existing instruments, minimizing iatrogenic damage.
    • Further quantitative clinical studies are recommended to validate these findings.