Related Experiment Video
Updated: Aug 20, 2025
10:19
Ceramic Omnidirectional Bioprinting in Cell-Laden Suspensions for the Generation of Bone Analogs
Published on: August 8, 2022
2.0K
Engineering Three-Dimensional-Printed Bioactive Polylactic Acid Alginate Composite Scaffolds with Antibacterial and
Claudio Iván Serra-Aguado1,2, Mar Llorens-Gámez3, Pablo Vercet-Llopis1,4
1Biomaterials and Bioengineering Lab, Centro de Investigación Traslacional San Alberto Magno, Universidad Católica de Valencia San Vicente Mártir, 46001Valencia, Spain.
ACS Applied Materials & Interfaces
|November 22, 2022
Summary
New poly(lactic acid) scaffolds with zinc and calcium offer enhanced bone regeneration. These biocompatible materials show promising osteoinductive and antibacterial properties for tissue engineering applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Fused Deposition Modeling (FDM) enables poly(lactic acid) (PLA) scaffold fabrication for tissue engineering.
- Existing PLA scaffolds lack crucial osteoinductive and antibacterial properties, limiting their efficacy.
- There is a need for advanced scaffolds that promote bone regeneration and prevent infection.
Purpose of the Study:
- To develop novel PLA scaffolds with enhanced osteoinductive and antibacterial functionalities.
- To investigate the potential of zinc (Zn 2+) and calcium (Ca 2+) cross-linked alginate within PLA scaffolds.
- To evaluate the in vivo bone regeneration capacity and material properties of the developed scaffolds.
Main Methods:
- Fabrication of PLA scaffolds infused with sodium alginate, cross-linked with Ca 2+ and Zn 2+.
- Assessment of antibacterial activity against *Staphylococcus epidermidis* and *Pseudomonas aeruginosa*.
- In vivo evaluation of bone regeneration in a rabbit model using tomography and histological analysis.
- Characterization of physical properties including water absorption, porosity, and mechanical strength.
Main Results:
- The developed PLA-alginate scaffolds demonstrated significant antibacterial activity against tested pathogens.
- In vivo studies confirmed the scaffolds' capacity for bone regeneration in a rabbit model.
- Material characterization revealed favorable compressive properties, water uptake, and porosity.
- The inclusion of Zn 2+ conferred essential osteoinductive and antibacterial characteristics.
Conclusions:
- PLA scaffolds incorporating zinc and calcium cross-linked alginate show significant promise for bone tissue regeneration.
- The enhanced osteoinductive and antibacterial properties address key limitations of traditional PLA scaffolds.
- These advanced biomaterials represent a viable option for developing next-generation bone defect treatments.
