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Related Experiment Videos

Remodeling of teeth by grinding.

B U Zachrisson, I A Mjör

    American Journal of Orthodontics
    |November 1, 1975
    PubMed
    Summary

    Extensive tooth grinding for orthodontic purposes showed minimal pulp and dentin reactions in young permanent teeth. Gentle techniques and smooth surfaces are crucial to avoid complications like caries and severe pulp responses.

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    Area of Science:

    • Dentistry
    • Orthodontics
    • Dental Histology

    Background:

    • Orthodontic treatment sometimes requires tooth reshaping.
    • Assessing pulp and dentin response to extensive grinding is critical for safety.

    Purpose of the Study:

    • To evaluate clinical and histological pulp and dentin reactions following extensive grinding of human premolars for orthodontic reshaping.

    Main Methods:

    • Forty-eight premolars were ground to resemble lateral incisors using diamond instruments and water cooling.
    • Teeth were extracted at various intervals (0-5 months) for histological examination; patients reported sensitivity.

    Main Results:

    • Minimal patient discomfort reported, primarily transient sensitivity to temperature.
    • Histology showed transient, localized pulp/dentin effects (e.g., hyperemia) that resolved over time.
    • No significant adverse reactions observed with proper technique; caries and severe reactions occurred with unintentional proximal retention areas.

    Conclusions:

    • Extensive grinding for orthodontic reshaping is generally safe for young permanent teeth when performed with gentle techniques and abundant water cooling.
    • Avoiding proximal retention areas is vital to prevent caries and subsequent severe pulp reactions.
    • This study supports the use of grinding for improving occlusal and esthetic outcomes in orthodontics.

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