Fatigue of packable dental composites.

Abstract

OBJECTIVE:

The purpose of the study was to measure the fatigue properties of four dental resin composites using a dynamic mechanical analysis and to relate the results with viscoelastic properties.

METHODS:

Dynamic torsional loading was conducted at resonance at 30-50Hz. Specimens were thoroughly cured and tested dry at 21 degrees C.

RESULTS:

All of the specimens showed a loss of strength following repeated stress, due to material fatigue. The material with the highest shear modulus had the lowest damping and the highest fatigue strength.

SIGNIFICANCE:

Dental composites exhibit a modest loss of strength due to fatigue. Since mastication involves many cycles of stress during the life of a restoration, fatigue properties should be taken into account in restoration design.

• Authors: Y Papadogiannis, R S Lakes, G Palaghias, M Helvatjoglu-Antoniades, D Papadogiannis
• Journal: Dental materials : official publication of the Academy of Dental Materials (Dent Mater) Vol. 23 Issue 2 Pg. 235-42 (Feb 2007) ISSN: 0109-5641 [Print] England
• PMID: 16490246 (Publication Type: Journal Article)

Chemical References

• Alert composite resin
• Composite Resins
• Dental Materials
• Filtek P60 Composite Resin
• Methacrylates
• Resin Cements
• Siloxanes
• admira
• synergy compact resin cement

Topics

• Compliance
• Composite Resins (chemistry)
• Dental Materials (chemistry)
• Dental Stress Analysis
• Elasticity
• Humans
• Materials Testing
• Methacrylates (chemistry)
• Models, Chemical
• Resin Cements (chemistry)
• Shear Strength
• Siloxanes (chemistry)
• Stress, Mechanical
• Surface Properties
• Torsion Abnormality
• Viscosity