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Related Experiment Videos

Ethoxylated bisphenol dimethacrylate-based amorphous calcium phosphate composites.

Drago Skrtic1, Joseph M Antonucci, Da-Wei Liu

  • 1National Institute of Standards and Technology, Paffenbarger Research Center, Gaithersburg, MD, USA. drago.skrtic@nist.gov

Acta Biomaterialia
|May 17, 2006
PubMed
Summary

Optimizing amorphous calcium phosphate (ACP) composites with specific resin formulations and milled fillers enhances remineralization potential. This research improved ion release and mechanical properties without negatively impacting composite performance.

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Area of Science:

  • Materials Science
  • Biomaterials Engineering
  • Dental Materials

Background:

  • Amorphous calcium phosphate (ACP) composites are researched for their anti-demineralizing and remineralizing properties.
  • Optimizing resin composition and filler characteristics is crucial for enhancing ACP composite performance.
  • Previous studies focused on improving mechanical properties and ion release without compromising composite integrity.

Purpose of the Study:

  • To investigate the effect of varying ethoxylated bisphenol A dimethacrylate (EBPADMA) to triethylene glycol dimethacrylate (TEGDMA) ratios on ACP composite properties.
  • To evaluate the impact of milled versus unmilled zirconia-ACP filler on composite performance.
  • To determine if increased EBPADMA/TEGDMA ratio enhances ion release without adversely affecting biaxial flexure strength (BFS), degree of vinyl conversion (DC), and water sorption (WS).

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Main Methods:

  • Experimental resins were formulated with different EBPADMA/TEGDMA and HEMA/MEP molar ratios.
  • Composites were prepared using either milled or unmilled zirconia-ACP filler (40% by mass) and photo-activated resin (60% by mass).
  • Properties assessed included ion release, BFS, DC, and WS.

Main Results:

  • All composites exhibited ion release significantly above the minimum required for remineralization.
  • Increasing the EBPADMA/TEGDMA ratio led to increased supersaturation; milled ACP composites showed higher BFS and lower WS than unmilled.
  • Resin composition variations did not affect BFS or DC, while milled ACP improved BFS and reduced DC reduction and WS.

Conclusions:

  • Fine-tuning the resin composition and using milled ACP filler significantly improves the remineralizing potential of ACP composites.
  • These modifications enhance ion release and mechanical strength without compromising DC or WS.
  • The study demonstrates a successful strategy for developing advanced ACP composites for dental applications.