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Related Experiment Videos

Scanning electron microscope study of scalers.

C J Antonini, J M Brady, M P Levin

    Journal of Periodontology
    |January 1, 1977
    PubMed
    Summary
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    Scanning electron microscopy revealed optimal scaler cutting edges are smooth, contiguous, and wire-edge-free. Proper hand sharpening with an Arkansas stone achieves this ideal edge for effective dental scaling.

    Area of Science:

    • Dental instruments
    • Materials science
    • Surface analysis

    Background:

    • Dental scalers require sharp cutting edges for effective plaque and calculus removal.
    • Improper sharpening can lead to non-functional or damaged cutting edges, compromising clinical efficacy.
    • Understanding the microstructural characteristics of scaler cutting edges is crucial for optimizing performance.

    Purpose of the Study:

    • To characterize the cutting edge morphology of factory-sharpened, dulled, and resharpened dental scalers using scanning electron microscopy.
    • To identify the optimal characteristics of a scaler cutting edge for effective clinical use.
    • To compare the effectiveness of different sharpening methods (machine vs. hand) on scaler edge quality.

    Main Methods:

    • Scanning electron microscopy (SEM) was employed to examine the surface topography of scaler cutting edges.

    Related Experiment Videos

  • Scalers were categorized into three groups: factory-sharpened, dulled, and resharpened (machine and hand).
  • Hand sharpening involved using an Arkansas stone (grit 500) applied to the lateral surface away from the cutting edge.

    • Main Results:

    • Factory-sharpened scalers exhibited undesirable "wire edges" (metallic extensions) on the lateral surface.
    • Machine-resharpened scalers produced non-functional wire edges on the facial surface.
    • Hand sharpening with an Arkansas stone resulted in a precise meeting of facial and lateral surfaces without wire edges.

    Conclusions:

    • An optimal scaler cutting edge is characterized by a smooth, contiguous junction of facial and lateral surfaces, free from wire edges.
    • Hand sharpening using an Arkansas stone effectively creates superior cutting edges compared to machine methods.
    • Functional wire edges, if present, must be properly oriented for effective calculus removal.