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Related Experiment Videos

The impression tray--an important factor in impression precision.

H J Rehberg

    International Dental Journal
    |June 2, 1977
    PubMed
    Summary
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    Dental impression trays significantly impact accuracy. Thicker, cold-curing plastic trays offer the most dimensional stability, minimizing distortions crucial for precise dental impressions.

    Area of Science:

    • Materials Science
    • Dental Materials
    • Biomaterials Engineering

    Background:

    • Accurate dental impressions are critical for prosthodontic and restorative treatments.
    • The dimensional stability of impression trays directly influences the fidelity of the final impression.
    • Previous research has not fully elucidated the impact of various tray materials and properties on impression precision.

    Purpose of the Study:

    • To investigate the flow behavior and dimensional stability of different dental impression tray materials.
    • To assess the influence of tray material type, thickness, and temperature on impression accuracy.
    • To identify tray materials that minimize distortion during the impression-taking process.

    Main Methods:

    • Evaluation of plastic, shellac-based, and cold-curing tray materials under various conditions.

    Related Experiment Videos

  • Testing for distortion under slight loads, shape retention during storage, and thermal distortion at body temperature.
  • Laboratory assessment of tray behavior during impression taking on models and examination of impression precision.

    • Main Results:

    • No tested tray materials exhibited complete rigidity; considerable distortions were measured across types and thicknesses.
    • Impression precision was found to be significantly related to the tray material used.
    • Cold-curing plastic trays, with a thickness greater than 2 mm, demonstrated the smallest dimensional alterations.

    Conclusions:

    • The choice of dental impression tray material is a critical factor influencing the precision of dental impressions.
    • Thicker, cold-curing plastic impression trays provide superior dimensional stability compared to other tested materials.
    • Optimizing tray material selection can lead to more accurate dental impressions and improved clinical outcomes.