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Related Experiment Video

Updated: Jul 17, 2026

Use of Autometallography to Localize and Semi-Quantify Silver in Cetacean Tissues
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Shark fin test and impression quality: a correlation analysis.

Markus Balkenhol1, Bernd Wöstmann, Masafumi Kanehira

  • 1Department of Prosthetic Dentistry, Justus-Liebig-University, Schlangenzahl 14, 35392 Giessen, Germany. markus.balkenhol@dentist.med.uni-giessen.de

Journal of Dentistry
|January 27, 2007
PubMed
Summary

The shark fin test correlates with rheological properties of dental impression materials but not with dimensional accuracy or surface detail reproduction. Therefore, it cannot predict clinical performance.

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Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision
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Published on: April 29, 2014

Area of Science:

  • Dental Materials Science
  • Rheology
  • Material Testing

Background:

  • The shark fin test is used to assess the working time and flow of dental impression materials.
  • Predicting clinical performance of impression materials based on laboratory tests is crucial for reliable dental restorations.

Purpose of the Study:

  • To determine the correlation between the shark fin test and key performance characteristics of dental impression materials.
  • To assess if the shark fin test can predict dimensional accuracy, surface detail reproduction, and rheological properties within the manufacturer's recommended working time.

Main Methods:

  • Four different dental impression materials (VPS, Polyether/VPS blend, classical Polyether, new Polyether) were evaluated.
  • The shark fin test was performed alongside dimensional accuracy, surface detail reproduction, and rheological property measurements.
  • Spearman's Rho correlation analysis was employed to analyze the data.

Main Results:

  • Significant correlations were observed between the shark fin test results and the phase angle and storage modulus of most impression materials.
  • No significant correlation was found between the shark fin test and the dimensional accuracy or surface detail reproduction of the tested materials.

Conclusions:

  • The shark fin test, within the recommended working time, does not reliably predict the dimensional accuracy or surface detail reproduction of dental impression materials.
  • Results from the shark fin test alone are insufficient to determine the clinical suitability of impression materials.