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Updated: Jun 10, 2026
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Biomechanical Characterization of Human Soft Tissues Using Indentation and Tensile Testing
Published on: December 13, 2016
Viscoelastic behavior of commercially available tissue conditioners under compression
Setsuo Saitoh1, Kaori Sasaki, Takashi Nezu
1Division of Dental Bio-engineering, Department of Pathogenesis and Control of Oral Diseases, Iwate Medical University School of Dentistry, Morioka, Iwate, Japan. setsuos@iwate-med.ac.jp
Dental Materials Journal
|July 30, 2010
Summary
This study compared the viscoelastic properties of three tissue conditioners: Tissue conditioner II (STII), Tissue conditioner (GTC), and Tissue Care (TTC). Results show distinct performance differences, suggesting STII and GTC are better for functional impressions, while TTC suits tissue conditioning.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Dental Materials Science
Background:
- Tissue conditioners are crucial in prosthodontics for patient comfort and denture stability.
- Understanding the viscoelastic properties of these materials is essential for optimizing their clinical application.
- Commercially available options like Tissue conditioner II (STII), Tissue conditioner (GTC), and Tissue Care (TTC) vary in composition and performance.
Purpose of the Study:
- To quantitatively evaluate and compare the viscoelastic properties of three distinct tissue conditioners.
- To determine how water immersion affects the mechanical behavior of these materials.
- To provide insights into the optimal clinical use of each tested tissue conditioner based on their material properties.
Main Methods:
- Rheological testing was performed on STII, GTC, and TTC under constant compressive distortion (10%).
- Key viscoelastic parameters including hardness, compressive modulus of elasticity, relaxation rate, relaxation time, and modulus of viscosity were measured.
- Material behavior was assessed both immediately after fabrication and after immersion in water.
Main Results:
- Immediately after fabrication, STII exhibited the highest hardness and elastic modulus, while TTC showed the highest relaxation rate and shortest relaxation time.
- Water immersion generally increased hardness, elastic modulus, relaxation time, and viscosity, while decreasing relaxation rates for all materials.
- Significant differences in viscoelastic properties were observed among STII, GTC, and TTC.
Conclusions:
- The three tissue conditioners possess distinct viscoelastic profiles, influencing their clinical suitability.
- STII and GTC demonstrate properties more aligned with functional impression materials due to their stability and elastic recovery.
- TTC's characteristics suggest it is better suited for direct application as a tissue conditioner, offering different handling and adaptation properties.
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