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Elastomeric PGS Scaffolds in Arterial Tissue Engineering
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Self-setting particle-stabilized emulsion for hard-tissue engineering.

Yasuhiko Iwasaki1, Yusuke Takahata1, Syuji Fujii2

  • 1Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita-shi, Osaka 564-8680, Japan.

Colloids and Surfaces. B, Biointerfaces
|December 24, 2014
PubMed
Summary
This summary is machine-generated.

Injectable calcium phosphate cements (CPCs) were created using microparticle-stabilized emulsions. These novel bone regeneration materials form interconnected porous structures, enhancing cell infiltration and bone repair.

Keywords:
Bone regenerationCalcium phosphate cementParticle-stabilized emulsionPolyphosphoestersSelf-settingTissue engineering

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Injectable self-setting materials are crucial for minimally invasive treatments and tissue engineering.
  • Calcium phosphate cements (CPCs) show promise for bone defect repair, but controlling their inner structure remains a challenge.
  • Well-defined inner structures in CPCs are vital for new bone apposition and remodeling.

Purpose of the Study:

  • To develop self-setting calcium phosphate cements (CPCs) with interconnected macroporous structures.
  • To utilize solid-particle-stabilized emulsions as templates for creating controlled porosity in CPCs.
  • To evaluate the potential of these novel CPCs for bone regeneration applications.

Main Methods:

  • Forming oil-in-water (o/w) emulsions using alpha-tricalcium phosphate (α-TCP) and poly(D,L-lactide-co-glycolide) (PLGA) microparticles with castor oil and water.
  • Utilizing α-TCP and PLGA microparticles as particulate emulsifiers at the oil-water interface.
  • Characterizing emulsion setting behavior using X-ray diffraction and compressive strength measurements.
  • Assessing the degradation of PLGA particles and the resulting pore structure formation.
  • Cultivating mouse osteoblastic (MC3T3-E1) cells on the set CPCs to evaluate cellular response.

Main Results:

  • The α-TCP and PLGA microparticles effectively stabilized the o/w emulsion, leading to spontaneous setting.
  • PLGA microparticles did not impede the hardening rate and enhanced the compressive strength of the set cements.
  • Hydrolytic degradation of PLGA particles created an interconnected macroporous structure within the CPC matrix.
  • MC3T3-E1 cells adhered to the CPCs, adopted a spindle shape, and invaded the porous structure post-PLGA degradation.

Conclusions:

  • Self-setting emulsions stabilized by α-TCP and PLGA microparticles offer a novel approach for creating macroporous CPCs.
  • The developed material demonstrates potential for bone regeneration due to its controlled porosity and ability to support cell infiltration.
  • This method provides a promising strategy for designing advanced CPCs for bone defect repair.