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Related Experiment Videos

Irreversible hydrocolloid and gypsum interactions

M H Reisbick1, W M Johnston, R G Rashid

  • 1Section of Restorative Dentistry, Prosthodontics, and Endodontics, College of Dentistry, Ohio State University, Columbus 43210-1241, USA.

The International Journal of Prosthodontics
|January 1, 1997
PubMed
Summary
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Dental material compatibility is crucial. This study found specific irreversible hydrocolloid impression materials negatively interact with some gypsum products, affecting dental die accuracy. Disinfection did not alter these interactions.

Area of Science:

  • Dental Materials Science
  • Biocompatibility Studies

Background:

  • Irreversible hydrocolloid impression materials are widely used in dentistry.
  • Gypsum products are commonly used for creating dental casts from impressions.
  • Potential material incompatibilities can compromise the accuracy of dental restorations.

Purpose of the Study:

  • To evaluate the compatibility between nine gypsum products and three irreversible hydrocolloid impression materials.
  • To assess the impact of disinfection on material interactions and die properties.
  • To determine if specific combinations affect detail reproduction and die surface quality.

Main Methods:

  • Used a test die and evaluation procedure adhering to ANSI/ADA specification no. 18.
  • Assessed detail reproduction of impression materials.

Related Experiment Videos

  • Evaluated detail transfer and roughness of gypsum dies poured from impressions.
  • Included disinfection of some impressions prior to pouring.

    • Main Results:

    • Confirmed deleterious surface interactions between certain irreversible hydrocolloid and gypsum materials.
    • Identified specific material combinations that result in compromised die accuracy.
    • Phenolic disinfectant did not influence material surface interactions or gypsum dimensional properties.

    Conclusions:

    • Material selection is critical to avoid adverse surface interactions in dental casting.
    • Specific irreversible hydrocolloid and gypsum combinations require careful consideration for accurate dental models.
    • Disinfection protocols using phenolic agents do not appear to exacerbate material incompatibility issues.