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Related Experiment Videos

Dimensional accuracy of three different alginate impression materials

B I Cohen1, M Pagnillo, A S Deutsch

  • 1Essential Dental Laboratories, South Hackensack, NJ, USA.

Journal of Prosthodontics : Official Journal of the American College of Prosthodontists
|September 1, 1995
PubMed
Summary

The new hydrophilic alginate demonstrated superior dimensional stability compared to Jeltrate, offering more accurate dental casts. Immediate measurement proved most effective for all tested alginate impression materials.

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Area of Science:

  • Dental Materials Science
  • Impression Techniques
  • Biomaterials

Background:

  • Alginate impression materials are widely used in dentistry.
  • Dimensional stability is crucial for accurate dental prosthetics.
  • Evaluating new alginate formulations is essential for improving clinical outcomes.

Purpose of the Study:

  • To assess the dimensional stability of three alginate impression materials.
  • To compare a new hydrophilic alginate with conventional materials (Jeltrate, Hydrogum).
  • To investigate the impact of various storage conditions on dimensional accuracy.

Main Methods:

  • Three alginate materials were tested under five storage conditions.
  • Samples were stored immediately, or for 10 minutes to 24 hours with/without a wet towel.

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  • A 4x5 factorial two-way analysis of variance was employed for statistical analysis.

    • Main Results:

    • The new hydrophilic alginate exhibited smaller buccolingual and diagonal dimensions versus Jeltrate.
    • Immediate measurement (buccolingual and diagonal) yielded the most accurate casts for all tested alginates.
    • Statistically, other materials showed similar dimensional stability.

    Conclusions:

    • Immediate measurement is optimal for achieving accurate casts with these alginate materials.
    • The new hydrophilic alginate offers comparable dimensional accuracy to Jeltrate and Hydrogum.
    • The new hydrophilic alginate incorporated 25% less water, potentially enhancing its properties.