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Tissue conditioners as functional impression materials.

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    Journal of Oral Rehabilitation
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    Three commercial tissue conditioners and one polysulphide impression material were tested. While exhibiting higher deformations and lower gypsum compatibility than standards, they are likely adequate, highlighting a need for international standards.

    Area of Science:

    • Dental Materials Science
    • Biomaterials Engineering

    Background:

    • Tissue conditioners and functional impression materials are crucial in prosthodontics.
    • Existing materials require rigorous evaluation against established standards.
    • ADA Specification No. 19 provides benchmarks for material performance.

    Purpose of the Study:

    • To evaluate the physical and mechanical properties of commercial tissue conditioners and a polysulphide impression material.
    • To assess compliance with ADA Specification No. 19.
    • To identify areas for improvement and standardization in dental impression materials.

    Main Methods:

    • Testing permanent deformation, compressive strain, flow, dimensional stability, and detail reproduction.
    • Assessing gypsum compatibility according to ADA Specification No. 19.

    Related Experiment Videos

  • Utilizing three commercial tissue conditioners (Coe-Comfort, FITT, Hydro-cast) and one polysulphide material (Coe-flex).

    • Main Results:

    • Tissue conditioners generally showed higher permanent deformation and lower gypsum compatibility than specified.
    • The polysulphide impression material's performance was also evaluated against the standard.
    • Despite deviations, the tested materials were deemed adequate for current clinical use.

    Conclusions:

    • The tested tissue conditioners and impression material exhibit properties that, while not fully meeting ADA Specification No. 19, are likely clinically acceptable.
    • There is a significant need for the development of international standards for tissue conditioners and functional impression materials.
    • Further research and standardization are recommended to ensure optimal material performance and patient outcomes.