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Updated: Aug 11, 2026
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Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
Fatigue of packable dental composites
Y Papadogiannis1, R S Lakes, G Palaghias
1Aristotle University of Thessaloniki, School of Dentistry, Department of Operative Dentistry, Thessaloniki, Greece. papady@dent.auth.gr
Summary
Dental composites weaken with repeated stress, a phenomenon known as material fatigue. Understanding these fatigue properties is crucial for designing durable dental restorations.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Dental Materials
Background:
- Dental resin composites are widely used in restorative dentistry.
- Understanding their long-term performance under oral conditions is essential.
- Material fatigue can affect the longevity of dental restorations.
Purpose of the Study:
- To measure the fatigue properties of four dental resin composites.
- To correlate fatigue resistance with viscoelastic properties using dynamic mechanical analysis (DMA).
Main Methods:
- Dynamic torsional loading was applied to specimens at their resonant frequency (30-50 Hz).
- Specimens were tested dry at a controlled temperature of 21°C.
- Dynamic Mechanical Analysis (DMA) was utilized to assess material behavior.
Main Results:
- All tested dental composites demonstrated a reduction in strength after cyclic loading, indicating material fatigue.
- The composite exhibiting the highest shear modulus displayed the lowest damping capacity.
- A higher shear modulus correlated with superior fatigue strength.
Conclusions:
- Dental resin composites experience a measurable loss of strength due to fatigue over time.
- The masticatory process involves numerous stress cycles, highlighting the importance of fatigue resistance.
- Fatigue properties should be a key consideration in the design and clinical application of dental restorations.
