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Related Concept Videos

Bone Remodeling01:40

Bone Remodeling

Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.

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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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3D-Printed Bone Scaffolds Promote Bone Regeneration Through a Multi-Stage Temporal Therapeutic Strategy.

Hao Zhou1, Di Wu2, Jun Cheng1

  • 1Department of Spine Surgery, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China.

Biotechnology and Bioengineering
|December 20, 2025
PubMed
Summary

This study presents a novel 3D-printed bone scaffold that temporally regulates bone healing. The composite material enhances early inflammation reduction, intermediate osteogenesis, and final osteoclast activity for effective bone defect repair.

Keywords:
Akebia saponin Dbone defect repairmultifunction scaffoldselective laser sinteringtemporal regulation

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Nanotechnology

Background:

  • Bone defect repair is complex, requiring precise temporal regulation.
  • Conventional bone scaffolds often fail due to inadequate spatio-temporal adaptation.
  • Developing advanced scaffolds is crucial for effective bone healing.

Purpose of the Study:

  • To develop a 3D-printed composite bone scaffold with temporally controlled release properties.
  • To investigate the scaffold's ability to modulate the inflammatory and regenerative phases of bone healing.
  • To assess the scaffold's potential for promoting effective bone defect repair.

Main Methods:

  • Fabrication of a 3D-printed composite scaffold using ordered hexagonal mesoporous silica nanoparticles (SBA-15) loaded with Akebia saponin D (ASD) and polylactic acid (PLLA) via selective laser sintering (SLS).
  • Evaluation of scaffold properties including porous structure, degradability, drug release kinetics, cytotoxicity, and cell adhesion.
  • Assessment of the scaffold's capacity to orchestrate macrophage polarization and modulate key phases of bone repair.

Main Results:

  • The developed scaffold exhibited a favorable porous structure, controlled degradability, and sustained drug release.
  • The composite material demonstrated minimal cytotoxicity and promoted high cell adhesion.
  • The scaffold successfully orchestrated macrophage polarization, reducing early inflammation, enhancing intermediate osteogenesis, and impeding final osteoclast activity.

Conclusions:

  • A novel 3D-printed composite bone scaffold system capable of temporally regulating bone healing has been developed.
  • The scaffold's ability to modulate inflammatory and regenerative processes offers a promising approach for bone defect treatment.
  • This innovative scaffold design holds significant potential for advancing regenerative medicine and orthopedic applications.