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Related Experiment Videos

Characterization of experimental composite biomaterials

D W Jones1, A S Rizkalla

  • 1Division of Biomaterials Science, Faculty of Dentistry, Dalhousie University, Halifax, Nova Scotia, Canada. dwjones@is.dal.ca

Journal of Biomedical Materials Research
|January 1, 1996
PubMed
Summary

This study investigated dental composite properties, finding that silane treatment significantly enhances elastic moduli. Higher filler content and light-curing resins also improved composite strength, with minimal impact from water storage.

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Dental Materials

Background:

  • Dental restorative composites utilize dimethacrylate resins and ceramic fillers.
  • Optimizing mechanical properties like elastic moduli is crucial for biomaterial performance.

Purpose of the Study:

  • To compare elastic moduli of various dimethacrylate-based composite systems.
  • To evaluate the influence of filler characteristics and processing on composite moduli.

Main Methods:

  • Synthesized ceramic fillers (contrasting shape/size) via wet chemistry.
  • Prepared composite systems with varying filler volumes (0-59% for Filler A, 0-48% for Filler B).
  • Determined dynamic elastic moduli, assessing effects of silane treatment and water storage.

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Main Results:

  • Silane treatment significantly increased composite elastic moduli.
  • Higher filler volume loading generally enhanced moduli.
  • Light-curing resins resulted in higher moduli at 38% filler loading.
  • Water storage had minimal effect on composites with >20% filler volume.

Conclusions:

  • Silane coupling agents are critical for enhancing the elastic moduli of dental composites.
  • Composite system design, including filler characteristics and matrix selection, significantly impacts mechanical performance.
  • Experimental composite moduli slightly exceeded theoretical predictions.