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E-jet printed polycaprolactone with strontium-substituted mesoporous bioactive glass nanoparticles for bone tissue
Chee Hoe Kong1, Chris Steffi2, Yanli Cai3
1Department of Orthopaedic Surgery, National University of Singapore, NUHS Tower Block, Level 11, 1E Kent Ridge Road, Singapore 119228, Singapore.
Biomaterials Advances
|January 4, 2025
Summary
This study developed a 3D-printed bone scaffold using polycaprolactone, strontium-substituted mesoporous bioactive glass nanoparticles, and icariin to treat osteoporosis. The innovative scaffold promotes bone regeneration and reduces bone resorption, offering a localized therapy with fewer systemic side effects.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Nanotechnology
Background:
- Osteoporosis significantly impacts aging populations, characterized by low bone density and high fracture risk.
- Current systemic osteoporosis treatments have notable adverse effects, necessitating localized therapeutic approaches.
- There is a critical need for advanced materials that can promote bone regeneration and inhibit bone loss locally.
Purpose of the Study:
- To develop and characterize a novel 3D-printed scaffold for localized osteoporosis treatment.
- To evaluate the efficacy of strontium-substituted mesoporous bioactive glass nanoparticles (Sr-MBGNPs) and icariin (ICN) integrated within a polycaprolactone (PCL) scaffold.
- To assess the scaffold's potential in enhancing osteoblast activity and suppressing osteoclast function for bone regeneration.
Main Methods:
- Fabrication of a 3D-printed PCL scaffold incorporating Sr-MBGNPs and ICN using e-jet printing.
- Characterization via scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS).
- Evaluation of ion release kinetics, scaffold hydrophilicity, bioactivity, and cellular responses (osteoblast proliferation/differentiation, osteoclastogenesis).
Main Results:
- The 3D-printed scaffold exhibited precise pore structures and uniform distribution of Sr-MBGNPs.
- Optimized Sr-MBGNP concentrations facilitated sustained ion release, enhanced hydrophilicity, and demonstrated bioactivity.
- Cellular assays confirmed the scaffold's ability to promote osteoblast activity and inhibit osteoclast formation, indicating dual therapeutic action.
Conclusions:
- The developed 3D-printed PCL scaffold loaded with Sr-MBGNPs and ICN is a promising localized treatment for osteoporosis.
- This localized approach minimizes systemic side effects associated with conventional osteoporosis therapies.
- The innovative combination of biomaterials and therapeutic agents offers a potential breakthrough in bone regeneration and osteoporosis management.
