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The preparation of a difunctional porous β-tricalcium phosphate scaffold with excellent compressive strength and antibacterial properties.

ABSTRACT: Porous β-tricalcium phosphate (β-Ca₃(PO₄)₂, β-TCP) scaffolds are widely applied in the field of bone tissue engineering due to their nontoxicity, degradability, biocompatibility, and osteoinductivity. However, poor compressive strength and a lack of antibacterial properties have hindered their clinical application. In order to address these disadvantages, graphene (G) and silver nanoparticles were introduced into β-TCP through a two-step method. In the synthesis process, G-β-TCP was prepared via an in situ synthesis method, and then silver nanoparticles and HAp particles were coated on the surface of the G-β-TCP scaffold in an orderly fashion using dopamine as a binder. From the results of characterization, when the content of graphene was 1 wt% of β-TCP, the G-β-TCP scaffold had the highest compression strength (127.25 MPa). And core-shell G-β-TCP-Ag-HAp not only had reduced cytotoxicity via the continuous release of Ag⁺, but it also achieved long-term antibacterial properties. Besides, the material still showed good cell activity and proliferation.

SUBMITTER: Qin L

PROVIDER: S-EPMC9055648 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature

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The preparation of a difunctional porous β-tricalcium phosphate scaffold with excellent compressive strength and antibacterial properties.

Qin Long L Yi Jiang J Xuefei Lai L Li Liao L Kenan Xie X Lu Xie X

RSC advances 20200730 47

Porous β-tricalcium phosphate (β-Ca3(PO4)2, β-TCP) scaffolds are widely applied in the field of bone tissue engineering due to their nontoxicity, degradability, biocompatibility, and osteoinductivity. However, poor compressive strength and a lack of antibacterial properties have hindered their clinical application. In order to address these disadvantages, graphene (G) and silver nanoparticles were introduced into β-TCP through a two-step method. In the synthesis ...[more]

PMID: 35519120

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Project description:Biodegradable polycaprolactone/β-tricalcium phosphate (PT) composites are desirable candidates for bone tissue engineering applications. A higher β-tricalcium phosphate (TCP) ceramic content improves the mechanical, hydrophilic and osteogenic properties of PT scaffolds in vitro. Using a dynamic degradation reactor, we established a steady in vitro degradation model to investigate the changes in the physio-chemical and biological properties of PT scaffolds during degradation.PT46 and PT37 scaffolds underwent degradation more rapidly than PT scaffolds with lower TCP contents. In vivo studies revealed the rapid degradation of PT (PT46 and PT37) scaffolds disturbed macrophage responses and lead to bone healing failure. Macrophage co-culture assays and a subcutaneous implantation model indicated that the scaffold degradation process dynamically affected macrophage responses, especially polarization. RNA-Seq analysis indicated phagocytosis of the degradation products of PT37 scaffolds induces oxidative stress and inflammatory M1 polarization in macrophages. Overall, this study reveals that the dynamic patterns of biodegradation of degradable bone scaffolds highly orchestrate immune responses and thus determine the success of bone regeneration. Therefore, through evaluation of the biological effects of biomaterials during the entire process of degradation on immune responses and bone regeneration are necessary in order to develop more promising biomaterials for bone regeneration. Graphical abstract Schematic illustration of the mechanisms of scaffold degradation-mediated macrophage polarization and bone healing processes. A) Degradation of typical PT 55 scaffolds mediates sequential macrophage M1-M2 polarization and a matched “slow early-fast afterwards” bone regeneration mode. B) Degradation of typical PT37 scaffolds mediates ROS generation by macrophages, constant M1 polarization and a disordered “fast initially-slow in late stage” bone regeneration mode.Image 1 Highlights • This work found the vital role of bone scaffolds bio-degradation process in bone regenerative determination.• Excessive polycaprolactone/β-TCP scaffolds degradation disturbed sequential macrophages polarization.• Dynamic degradation model provided a way of investigation of degradation process of PCL/β-TCP scaffolds.• Phagocytosis of degradation products (DPs) by macrophages caused oxidative stress and M1 polarization in macrophages.

Dataset Information

The preparation of a difunctional porous β-tricalcium phosphate scaffold with excellent compressive strength and antibacterial properties.

Publications

The preparation of a difunctional porous β-tricalcium phosphate scaffold with excellent compressive strength and antibacterial properties.

Similar Datasets

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