Oral diseases are common and prevalent,affecting people's health and seriously impairing their quality of life.The implantable class of materials for a safe,convenient,and comprehensive cure of periodontitis is hi...Oral diseases are common and prevalent,affecting people's health and seriously impairing their quality of life.The implantable class of materials for a safe,convenient,and comprehensive cure of periodontitis is highly desired.This study shows a proof-of-concept demonstration about the implant fibrous membranes.The fibers having a trilayer eccentric side-by-side structure are fabricated using the multiple-fluid electrospinning,and are fine candidates for treating periodontitis.In the trilayer eccentric side-by-side composite nanofibers,the outermost layer contains a hydrophilic polymer and a drug called ketoprofen,which can reach a release of 50%within 0.37 h,providing a rapid pain relief and anti-inflammatory effect.The middle layer is loaded with metronidazole,which is manipulated to be released in a sustained manner.The innermost layer is loaded with nano-hydroxyapatite,which can directly contact with periodontal tissues to achieve the effect of promoting alveolar bone growth.The experimental results indicate that the developed implant films have good wettability,fine mechanical properties,biodegradability,and excellent antibacterial properties.The implant films can reduce inflammatory responses and promote osteoblast formation by down-regulating interleukin 6 and up-regulating osteoprotegerin expression.In addition,their composite nanostructures exhibit the desired promotional effects on fibroblast attachment,infiltration,proliferation,and differentiation.Overall,the developed fibrous implant films show strong potential for use in a combined treatment of periodontitis.The protocols reported here pave a new way to develop multi-chamber based advanced fiber materials for realizing the desired functional performances through a robust process-structure-performance relationship.展开更多
静电纺丝过程工艺参数对产品结构性能有很大影响,如何可控制备理想的纳米纤维材料成为电纺研究的重点。本文通过单因素实验考察静电纺丝重要工艺参数对PVC纳米纤维膜成纤性状的影响,并以此为依据确定因素水平范围,然后采用均匀设计法进...静电纺丝过程工艺参数对产品结构性能有很大影响,如何可控制备理想的纳米纤维材料成为电纺研究的重点。本文通过单因素实验考察静电纺丝重要工艺参数对PVC纳米纤维膜成纤性状的影响,并以此为依据确定因素水平范围,然后采用均匀设计法进行了多因素多水平的实验设计。实验结果表明:均匀设计法可采用较少的实验数据回归分析得到PVC静电纺丝最佳工艺参数(纺丝液浓度13%、流速1.2 m L/h、混合溶剂质量比DMF/THF=3/2、针头内径0.60 mm、静电纺电压20 k V和纺距25 cm),回归模型能有效预测纤维平均直径和串珠数,得到与实验值接近的结果。此方法为可控、有效制备复杂的聚氯乙烯纳米纤维材料奠定了基础。展开更多
基金supported by the Medical-Engineering Cross Project between University of Shanghai for Science and technology and Shanghai Jiaotong University(No.202130071)the Shanghai Industrial Collaboration Project(HCXBCY-2023-042 and XTCX-KJ-2023-44).
文摘Oral diseases are common and prevalent,affecting people's health and seriously impairing their quality of life.The implantable class of materials for a safe,convenient,and comprehensive cure of periodontitis is highly desired.This study shows a proof-of-concept demonstration about the implant fibrous membranes.The fibers having a trilayer eccentric side-by-side structure are fabricated using the multiple-fluid electrospinning,and are fine candidates for treating periodontitis.In the trilayer eccentric side-by-side composite nanofibers,the outermost layer contains a hydrophilic polymer and a drug called ketoprofen,which can reach a release of 50%within 0.37 h,providing a rapid pain relief and anti-inflammatory effect.The middle layer is loaded with metronidazole,which is manipulated to be released in a sustained manner.The innermost layer is loaded with nano-hydroxyapatite,which can directly contact with periodontal tissues to achieve the effect of promoting alveolar bone growth.The experimental results indicate that the developed implant films have good wettability,fine mechanical properties,biodegradability,and excellent antibacterial properties.The implant films can reduce inflammatory responses and promote osteoblast formation by down-regulating interleukin 6 and up-regulating osteoprotegerin expression.In addition,their composite nanostructures exhibit the desired promotional effects on fibroblast attachment,infiltration,proliferation,and differentiation.Overall,the developed fibrous implant films show strong potential for use in a combined treatment of periodontitis.The protocols reported here pave a new way to develop multi-chamber based advanced fiber materials for realizing the desired functional performances through a robust process-structure-performance relationship.
文摘静电纺丝过程工艺参数对产品结构性能有很大影响,如何可控制备理想的纳米纤维材料成为电纺研究的重点。本文通过单因素实验考察静电纺丝重要工艺参数对PVC纳米纤维膜成纤性状的影响,并以此为依据确定因素水平范围,然后采用均匀设计法进行了多因素多水平的实验设计。实验结果表明:均匀设计法可采用较少的实验数据回归分析得到PVC静电纺丝最佳工艺参数(纺丝液浓度13%、流速1.2 m L/h、混合溶剂质量比DMF/THF=3/2、针头内径0.60 mm、静电纺电压20 k V和纺距25 cm),回归模型能有效预测纤维平均直径和串珠数,得到与实验值接近的结果。此方法为可控、有效制备复杂的聚氯乙烯纳米纤维材料奠定了基础。
