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Related Experiment Videos

Dentine/pulp reactions to full crown preparation procedures.

B L Dahl

    Journal of Oral Rehabilitation
    |July 1, 1977
    PubMed
    Summary

    Scanning electron microscopy revealed dentine smear formation during tooth preparation. While removable, debris plugs remain, and severe pulp reactions necessitate limiting this technique to superficial use.

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    Area of Science:

    • Dental materials science
    • Oral histology
    • Biomaterials engineering

    Background:

    • Dentine smear layer formation is a critical factor in restorative dentistry.
    • Understanding smear layer removal and its effects on pulp tissue is essential for clinical success.
    • Previous research has not fully elucidated the impact of specific grinding techniques on smear layer and pulp response.

    Purpose of the Study:

    • To investigate dentine smear formation using scanning electron microscopy.
    • To evaluate pulp reactions to full crown preparation using histological techniques.
    • To assess the effectiveness of pumice polishing in smear layer removal.

    Main Methods:

    • Scanning electron microscopy (SEM) for smear layer visualization.
    • Histological analysis of pulp tissue reactions.
    • Tooth preparation using a water-cooled diamond in an air turbine.
    • Pulp reaction assessment following full crown preparation.

    Main Results:

    • Dentine smear layer was observed after grinding.
    • Light polishing with wet pumice partially removed the smear layer, leaving debris plugs in tubule apertures.
    • No bacteria were detected on prepared surfaces.
    • Severe, acute pulp reactions were observed subjacent to prepared dentinal tubules.

    Conclusions:

    • The grinding technique produces a dentine smear layer that is not completely removed by pumice polishing.
    • Debris plugs remaining in dentinal tubules may have clinical implications.
    • Severe pulp inflammation indicates the technique's limitations for deep preparations.
    • Further clinical investigation is required to determine the significance of these findings.

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