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Published on: September 11, 2015
Engineering a microparticle-loaded rough membrane for guided bone regeneration modulating osteoblast response without
Leire Díez-Tercero1, Èlia Bosch-Rué1, Begoña M Bosch1
1Bioengineering Institute of Technology, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Barcelona, Spain; Basic Science Department, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Barcelona, Spain.
New collagen membranes with alginate-hydroxyapatite microparticles enhance guided bone regeneration (GBR) without causing inflammation. These improved membranes show potential for bone defect repair by increasing alkaline phosphatase activity.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Oral and Maxillofacial Surgery
Background:
- Guided bone regeneration (GBR) utilizes membranes to prevent soft tissue ingrowth into bone defects.
- Collagen membranes are the gold standard but can be negatively impacted by acute inflammation at the implant site.
- Developing enhanced membranes is crucial for improving GBR outcomes.
Purpose of the Study:
- To develop a novel collagen-based membrane for GBR incorporating alginate-hydroxyapatite microparticles.
- To evaluate the physical, chemical, and biological properties of the modified membranes.
- To assess the potential of these membranes to promote bone regeneration and modulate inflammatory responses.
Main Methods:
- Membranes were fabricated using collagen type I, gelatin, and alginate-hydroxyapatite microparticles.
- Characterization included scanning electron microscopy, confocal microscopy, swelling tests, enzymatic degradation, and tensile tests.
- Biological evaluation involved assessing cytotoxicity, alkaline phosphatase (ALP) activity, and inflammatory cytokine release using SaOs-2 cells and THP-1 macrophages.
Main Results:
- Incorporation of microparticles altered membrane surface topography.
- The developed membranes were non-cytotoxic to macrophages and bone cells.
- No significant pro-inflammatory cytokine release was observed.
- Collagen-gelatin membranes with microparticles increased ALP activity, indicating enhanced bone regeneration potential.
- Surface topography modifications did not significantly alter macrophage morphology or cytokine release.
Conclusions:
- Collagen-gelatin membranes incorporating alginate-hydroxyapatite microparticles are promising for GBR.
- These membranes promote osteogenic activity without inducing adverse inflammatory reactions.
- Further research is needed to explore the influence of substrate stiffness and composition on macrophage behavior in GBR.
