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Related Experiment Videos

Impression material thickness in stock and custom trays.

T J Bomberg, R A Hatch, W Hoffman

    The Journal of Prosthetic Dentistry
    |August 1, 1985
    PubMed
    Summary

    This study compared impression material thickness between custom acrylic and stock trays, finding a difference less than 1 mm. The cost-effectiveness and convenience of stock trays suggest their use if this minor thickness variation doesn't impact final dental casting success.

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    Area of Science:

    • Dental Materials Science
    • Prosthodontics

    Background:

    • Accurate dental impressions are crucial for successful prosthodontic restorations.
    • Custom acrylic resin trays are often advocated for impression accuracy.
    • Manufactured stock trays are widely used due to convenience and cost.

    Purpose of the Study:

    • To compare the impression material thickness between custom acrylic resin trays and manufactured stock trays.
    • To evaluate the clinical significance of observed differences in material thickness.

    Main Methods:

    • Impression material thickness was measured in areas corresponding to prepared teeth.
    • Two types of trays were compared: custom acrylic resin trays and manufactured stock trays.

    Main Results:

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    • A mean difference in material thickness of less than 1 mm was found between the two tray types.
    • The clinical significance of this difference on impression and casting success remains undetermined.

    Conclusions:

    • Manufactured stock trays offer significant economic and convenience advantages over custom trays.
    • If the minimal thickness difference does not compromise clinical outcomes, stock trays may be a viable alternative.
    • Careful fabrication and handling of custom trays are essential to maximize their benefits if material thickness is critical.