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In vitro fatigue behavior of restorative composites and glass ionomers.

AbstractOBJECTIVES:
This in vitro study was conducted to investigate the fatigue behavior of several dental restoratives, including composites, glass ionomers and a resin-reinforced glass ionomer.
METHODS:
Fatigue was imposed under a reverse stress-controlled regimen, following a staircase approach. Samples were stored and tested under both dry and wet conditions. The following parameters were measured and analyzed: Young's modulus, restrained fracture strength, and flexural fatigue limit.
RESULTS:
As a general trend, all products showed a decrease in Young's modulus following water sorption. For all products except the resin-reinforced glass ionomer, the same trend was seen in the restrained fracture strength. This is, however, no longer valid for the flexural fatigue limit: the trend is steady-state for the glass ionomers, status quo for the resin-reinforced glass ionomer, and all composites tested show a decrease.
SIGNIFICANCE:
The diversity in structure of both composites and glass ionomers does not allow findings for one product to be extrapolated to other similar products.
AuthorsM J Braem, P Lambrechts, S Gladys, G Vanherle
JournalDental materials : official publication of the Academy of Dental Materials (Dent Mater) Vol. 11 Issue 2 Pg. 137-41 (Mar 1995) ISSN: 0109-5641 [Print] England
PMID8621035 (Publication Type: Comparative Study, Journal Article)
Chemical References
  • Charisma composite resin
  • Compomers
  • Composite Resins
  • Dyract
  • Fuji II LC cement
  • Glass Ionomer Cements
  • Methacrylates
  • Resin Cements
  • Resins, Synthetic
  • Silicates
  • Vitremer
  • Z100 composite resin
  • Water
  • Herculite XR
  • P50 composite resin
  • Silux Plus
  • Bisphenol A-Glycidyl Methacrylate
  • Silicon Dioxide
  • Zirconium
Topics
  • Bisphenol A-Glycidyl Methacrylate (chemistry)
  • Compomers
  • Composite Resins (chemistry)
  • Dental Stress Analysis
  • Elasticity
  • Glass Ionomer Cements (chemistry)
  • Materials Testing
  • Methacrylates (chemistry)
  • Pliability
  • Resin Cements
  • Resins, Synthetic (chemistry)
  • Silicates (chemistry)
  • Silicon Dioxide (chemistry)
  • Water (chemistry)
  • Zirconium (chemistry)

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