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Polymeric microstructures with shape-memory properties for biomedical use built by stereolithography.

Shahriar Sharifi1, Sebastien Blanquer, Dirk W Grijpma

  • 1Department of Biomedical Engineering, University Medical Centre Groningen and University of Groningen, Groningen, The Netherlands.

Journal of Applied Biomaterials & Functional Materials
|December 18, 2012
PubMed
Summary
This summary is machine-generated.

Biodegradable poly(D,L-lactide-co-trimethylene carbonate) dimethacrylate macromers were used to create porous, shape-memory microstructures. These novel scaffolds show promise for tissue engineering applications due to their tunable properties and shape recovery.

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Tissue Engineering

Background:

  • Developing advanced materials for tissue engineering is crucial for regenerative medicine.
  • Biodegradable polymers offer unique advantages for temporary medical implants and scaffolds.
  • Shape memory polymers (SMPs) enable dynamic structural changes for advanced applications.

Purpose of the Study:

  • To design and fabricate porous microstructures with shape memory properties.
  • To utilize biodegradable poly(D,L-lactide-co-trimethylene carbonate) dimethacrylate macromers.
  • To explore applications in tissue engineering and biomedical fields.

Main Methods:

  • Stereolithography was employed to create gyroid pore network architectures (930 µm average pore size).
  • Micro-computed tomography (µ-CT) was used for structural characterization.
  • Shape recovery and fixity were evaluated after 40% and 70% compression at varying temperatures.

Main Results:

  • The flexible structures exhibited a compression modulus of 60 KPa at 37 °C and were fully compressible.
  • Thermal analysis revealed amorphous networks with a glass transition temperature (Tg) of 23 °C.
  • Near-quantitative shape fixity (at 0 °C) and shape recovery (at 37 °C) were achieved after compression.

Conclusions:

  • The fabricated microstructures possess well-defined pore networks and significant shape-memory properties.
  • These characteristics make them suitable for use as deployable scaffolds in tissue engineering.
  • The biodegradable nature and tunable properties enhance their potential for biomedical applications.