以聚氨醋泡沫为模板,采用浸渍工艺制备载银紫砂泡沫陶瓷.主要研究了 AgN03 浓度、浸渍时间、p H 值、热处理温度对载银紫砂泡沫陶瓷载银量的影响以及不同载银量样品的抗菌性能.实验结果表明,制备载银紫砂泡沫陶瓷最佳工艺条件为AgN03 浓...以聚氨醋泡沫为模板,采用浸渍工艺制备载银紫砂泡沫陶瓷.主要研究了 AgN03 浓度、浸渍时间、p H 值、热处理温度对载银紫砂泡沫陶瓷载银量的影响以及不同载银量样品的抗菌性能.实验结果表明,制备载银紫砂泡沫陶瓷最佳工艺条件为AgN03 浓度0 . 1 m ol/L、浸渍时间90 min、PH = 10、热处理温度400 t .制备的载银紫砂泡沫陶瓷孔隙结构均勻,尺寸分布在O. 3 -0. 7m m 范围.银均勻分布于载银紫砂泡沫陶瓷中,使其具备良好的抗菌性能,且随着载银量增大,抗菌效果越明显.展开更多
Orthopedic infections pose severe societal and economic burden and interfere with the capability of the implanted devices to integrate in the host bone,thus significantly increasing implants failure rate.To address in...Orthopedic infections pose severe societal and economic burden and interfere with the capability of the implanted devices to integrate in the host bone,thus significantly increasing implants failure rate.To address infection and promote integration,here nanostructured antibacterial and bioactive thin films are proposed,obtained,for the first time,by Ionized Jet Deposition(IJD)of silver-substituted tricalcium phosphate(Ag-TCP)targets on titanium.Coatings morphology,composition and mechanical properties are characterized and proof-of-concept of biocompatibility is shown.Antimicrobial efficacy is investigated against four Gram positive and Gram negative bacterial strains and against C.albicans fungus,by investigating the modifications in planktonic bacterial growth in the absence and presence of silver.Then,for all bacterial strains,the capability of the film to inhibit bacterial adhesion is also tested.Results indicate that IJD permits a fine control over films composition and morphology and deposition of films with suitable mechanical properties.Biological studies show a good efficacy against Escherichia coli,Staphylococcus aureus,Pseudomonas aeruginosa,Enterococcus faecalis and against fungus Candida albicans,with evidences of efficacy against planktonic growth and significant reduction of bacterial cell adhesion.No cytotoxic effects are evidenced for equine adipose tissue derived mesenchymal stem cells(ADMSCs),as no reductions are caused to cells viability and no interference is assessed in cells differentiation towards osteogenic lineage,in the presence of silver.Instead,thanks to nanostructuration and biomimetic composition,tricalcium phosphate(TCP)coatings favor cells viability,also when silver-substituted.These findings show that silver-substituted nanostructured coatings are promising for orthopedic implant applications.展开更多
文摘以聚氨醋泡沫为模板,采用浸渍工艺制备载银紫砂泡沫陶瓷.主要研究了 AgN03 浓度、浸渍时间、p H 值、热处理温度对载银紫砂泡沫陶瓷载银量的影响以及不同载银量样品的抗菌性能.实验结果表明,制备载银紫砂泡沫陶瓷最佳工艺条件为AgN03 浓度0 . 1 m ol/L、浸渍时间90 min、PH = 10、热处理温度400 t .制备的载银紫砂泡沫陶瓷孔隙结构均勻,尺寸分布在O. 3 -0. 7m m 范围.银均勻分布于载银紫砂泡沫陶瓷中,使其具备良好的抗菌性能,且随着载银量增大,抗菌效果越明显.
基金Dr.Gabriela Graziani acknowledges funding from the project Starting Grant SG-2018-12367059financed by the Italian Ministry of Health(BANDO RICERCA FINALIZZATA 2018).
文摘Orthopedic infections pose severe societal and economic burden and interfere with the capability of the implanted devices to integrate in the host bone,thus significantly increasing implants failure rate.To address infection and promote integration,here nanostructured antibacterial and bioactive thin films are proposed,obtained,for the first time,by Ionized Jet Deposition(IJD)of silver-substituted tricalcium phosphate(Ag-TCP)targets on titanium.Coatings morphology,composition and mechanical properties are characterized and proof-of-concept of biocompatibility is shown.Antimicrobial efficacy is investigated against four Gram positive and Gram negative bacterial strains and against C.albicans fungus,by investigating the modifications in planktonic bacterial growth in the absence and presence of silver.Then,for all bacterial strains,the capability of the film to inhibit bacterial adhesion is also tested.Results indicate that IJD permits a fine control over films composition and morphology and deposition of films with suitable mechanical properties.Biological studies show a good efficacy against Escherichia coli,Staphylococcus aureus,Pseudomonas aeruginosa,Enterococcus faecalis and against fungus Candida albicans,with evidences of efficacy against planktonic growth and significant reduction of bacterial cell adhesion.No cytotoxic effects are evidenced for equine adipose tissue derived mesenchymal stem cells(ADMSCs),as no reductions are caused to cells viability and no interference is assessed in cells differentiation towards osteogenic lineage,in the presence of silver.Instead,thanks to nanostructuration and biomimetic composition,tricalcium phosphate(TCP)coatings favor cells viability,also when silver-substituted.These findings show that silver-substituted nanostructured coatings are promising for orthopedic implant applications.
