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3D Analysis of Multi-cellular Responses to Chemoattractant Gradients
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Quantification of cell response to polymeric composites using a two-dimensional gradient platform.

Nancy J Lin1, Haiqing Hu, Lipin Sung

  • 1Polymers Division, National Institute of Standards and Technology, Gaithersburg, MD 20899-8543, USA. nancy.lin@nist.gov

Combinatorial Chemistry & High Throughput Screening
|July 16, 2009
PubMed
Summary
This summary is machine-generated.

This study introduces a rapid screening method for dental composite biocompatibility. Higher filler content improves cell viability, even at lower conversions, simplifying material selection.

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Area of Science:

  • Biomaterials Science
  • Dental Materials Science
  • Cell Biology

Background:

  • Assessing dental composite biocompatibility requires efficient screening methods.
  • Understanding cell-material interactions is crucial for developing safe dental restorations.

Purpose of the Study:

  • To develop a combinatorial screening approach for dental composites.
  • To correlate material properties with cellular responses.

Main Methods:

  • Gradient composite samples were fabricated with varying filler content and degree of conversion (DC).
  • Near-infrared spectroscopy (NIR) measured DC; laser scanning confocal microscopy (LSCM) analyzed surface morphology.
  • RAW 264.7 macrophage-like cells were cultured on samples to assess viability, density, and area at 24 hours.

Main Results:

  • Cellular responses (viability, density, area) significantly varied with composite properties.
  • Composites with higher filler content (>35% by mass) maintained cell viability even at low DC (52%).
  • Lower filler content (<35% by mass) resulted in decreased cell viability and density.

Conclusions:

  • Dental composite biocompatibility is influenced by a complex interplay of factors including DC, filler type, filler ratio, and surface morphology.
  • The combinatorial approach allows for simultaneous screening of multiple material compositions and properties.
  • This method aids in selecting biocompatible dental composite formulations and optimizing processing conditions.