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Related Experiment Video

Updated: Apr 22, 2026

Distinctive Capillary Action by Micro-channels in Bone-like Templates can Enhance Recruitment of Cells for Restoration of Large Bony Defect
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Injectable scaffolds for bone regeneration.

Sabina Yasmeen1, Man Kit Lo, Salina Bajracharya

  • 1School of Pharmacy and Biomedical Science, University of Portsmouth , St. Michael's Building, White Swan Road, Portsmouth, UK.

Langmuir : the ACS Journal of Surfaces and Colloids
|October 9, 2014
PubMed
Summary
This summary is machine-generated.

Novel injectable hydrogels made from chitosan, hydroxyapatite (HA), and carbon nanotubes (CNTs) offer a less invasive approach for bone defect regeneration. These advanced materials enhance bone healing and enable sustained drug delivery.

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Nanotechnology

Background:

  • Current bone defect treatments like auto- and allografts are invasive and carry risks of infection and rejection.
  • There is a critical need for less invasive therapeutic strategies that leverage the bone's natural regenerative capacity.

Purpose of the Study:

  • To develop novel stimuli-responsive composite hydrogels for bone tissue engineering.
  • To investigate the potential of incorporating hydroxyapatite (HA) and carbon nanotubes (CNTs) into chitosan-based gels.
  • To evaluate the injectable, mechanical, bioactive, and drug delivery properties of these advanced materials.

Main Methods:

  • Chitosan gels were synthesized using glycerol phosphate as a cross-linker.
  • Chitosan grafted with CNTs and a chitosan-HA complex were incorporated as nanofillers.
  • The sol/gel transition temperature, mechanical strength, bioactivity, and drug release profiles were characterized.

Main Results:

  • The addition of HA and CNT nanofillers accelerated the sol/gel transition at 37 °C.
  • The composite hydrogels exhibited significantly enhanced mechanical properties compared to controls.
  • The materials demonstrated good bioactivity and sustained release of protein drugs, indicating potential for therapeutic applications.

Conclusions:

  • Injectable, thermosensitive composite hydrogels incorporating CNTs and HA offer improved properties for bone regeneration.
  • These advanced biomaterials present a promising, less invasive alternative to traditional bone grafting procedures.
  • The developed hydrogels show potential for enhanced bone healing and controlled therapeutic agent delivery.