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Related Experiment Videos

Modified polyalkenoate (glass-ionomer) cement--a study

R K Bansal1, U S Tewari, P Singh

  • 1Department of Chemistry, Indian Institute of Technology, New Delhi.

Journal of Oral Rehabilitation
|July 1, 1995
PubMed
Summary

Adding borax to glass-ionomer cements (GICs) shortens setting times but negatively impacts physical properties. Fluoride release remains unaffected by borax modification in these dental materials.

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Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering

Background:

  • Glass-ionomer cements (GICs) are widely used dental restorative materials.
  • Modifying GICs can improve their properties and clinical performance.
  • Borax (sodium tetraborate decahydrate) is explored as a potential modifier.

Purpose of the Study:

  • To investigate the effect of incorporating varying amounts of borax into conventional glass-ionomer cements.
  • To evaluate the impact of borax on the working time, setting time, mechanical properties, solubility, and fluoride release of GICs.

Main Methods:

  • Conventional glass-ionomer cements were prepared with 5-15% borax.
  • Powder to liquid ratio was maintained at 1.5:1 with polyacrylic acid.
  • Properties tested included working time, setting time, compressive strength, diametral tensile strength, solubility, and fluoride release.

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Main Results:

  • Addition of borax significantly reduced the working and setting times of the glass-ionomer cements.
  • Compressive strength, diametral tensile strength, and solubility showed deterioration with increased borax content.
  • Fluoride release from the modified glass-ionomer cements was not significantly affected by borax addition.

Conclusions:

  • Borax acts as an accelerator for glass-ionomer cements, reducing setting times.
  • The inclusion of borax compromises key mechanical properties and increases solubility.
  • Borax modification does not enhance fluoride release, suggesting limited benefits for caries prevention.