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In Vivo Evaluation of the Mechanical and Viscoelastic Properties of the Rat Tongue
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Published on: July 6, 2017

In vitro evaluation of a mechanical testing chewing simulator.

Martin Steiner1, Miltiadis E Mitsias, Klaus Ludwig

  • 1Department of Prosthodontics, Propaedeutics and Dental Materials, Christian-Albrechts University Kiel, Arnold-Heller-Str. 16, 24105 Kiel, Germany. msteiner@proth.uni-kiel.de

Dental Materials : Official Publication of the Academy of Dental Materials
|November 28, 2008
PubMed
Summary

This study evaluated a chewing simulator, finding significant force variations between chambers and deviations from set loads. Calibrations are recommended for accurate in vitro chewing simulations.

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Area of Science:

  • Biomaterials Science
  • Mechanical Engineering
  • Dental Research

Background:

  • Chewing simulators are crucial for evaluating dental materials under simulated masticatory forces.
  • Accurate and reproducible force application is essential for reliable in vitro testing.

Purpose of the Study:

  • To evaluate the force-profile and accuracy of a weight-controlled chewing simulator (Williytec).
  • To assess the repetition accuracy and variation in force application across different chambers and load settings.

Main Methods:

  • Piezoelectric force sensors were used to record maximum and mean forces.
  • Three load configurations and varying descending speeds were tested in eight specimen chambers.
  • Repetition accuracy within a single test chamber was determined.

Main Results:

  • High load repetition accuracy was observed across different cycle rates.
  • Significant variations in applied forces (up to 38.2 N) were found between specimen chambers.
  • Recorded loads deviated from nominal static weights, influenced by descending speed and selected weight, with mechanical vibrations causing load profile ringing.

Conclusions:

  • Weight-controlled chewing simulators exhibit variability in force application that must be considered in study reporting.
  • Regular calibration of test chambers is necessary to ensure uniform testing conditions and reliable results.