应用化学 ›› 2023, Vol. 40 ›› Issue (4): 536-545.DOI: 10.19894/j.issn.1000-0518.220253

• 研究论文 • 上一篇    下一篇

3D打印nHA/PEEK-AgNPs复合多孔支架的制备与性能

马欲杰1, 张赢心2, 戴桓琰1, 徐志民1, 韩冰1()   

  1. 1.吉林大学口腔医院口腔颌面外二科,长春 130021
    2.吉林大学口腔医院口腔急诊科,长春 130021
  • 收稿日期:2022-07-26 接受日期:2023-02-22 出版日期:2023-04-01 发布日期:2023-04-17
  • 通讯作者: 韩冰
  • 基金资助:
    吉林省科技厅国际科技合作项目(20190701035GH);吉林省发改委产业技术与研究项目(2019C051-11)

Preparation and Properties of 3D Printed nHA/PEEK-AgNPs Composite Porous Scaffolds

Yu-Jie MA1, Ying-Xin ZHANG2, Huan-Yan DAI1, Zhi-Min XU1, Bing HAN1()   

  1. 1.Department of Oral and Maxillofacial Surgery II,Stomatological Hospital of Jilin University,Changchun 130021,China
    2.Department of Oral Emergency,Stomatological Hospital of Jilin University,Changchun 130021,China
  • Received:2022-07-26 Accepted:2023-02-22 Published:2023-04-01 Online:2023-04-17
  • Contact: Bing HAN
  • About author:hbing@jlu.edu.cn
  • Supported by:
    the International Science and Technology Cooperation Project of Jilin Provincial Science and Technology Department(20190701035GH);the Industrial Technology and Research Project of Jilin Provincial Development and Reform Commission(2019C051-11)

摘要:

通过熔融沉积成型3D(FDM 3D)打印技术进行打印,制备成nHA/PEEK复合多孔支架。再采用多巴胺氧化聚合和硝酸银化学还原法,在支架表面形成银纳米颗粒涂层,从而制备出nHA/PEEK-AgNPs复合多孔支架。nHA/PEEK-AgNPs具有独特的三维多孔结构,表面接触角约为(33.2±3.65)(°),展示出较好的亲水性。力学测试结果显示,nHA/PEEK-AgNPs多孔支架的最大压缩强度为(47.4±3.9) MPa,明显高于PEEK组的(36.3±7.3) MPa。同时,最大弹性模量与PEEK组无明显差异,表明复合材料的力学强度与PEEK多孔支架相比有所增强。抑菌实验结果显示,对于大肠杆菌和金黄色葡萄球菌具有明显的抑菌性,抑菌率分别达到(89.4±2.4)%和(85.8±4.4)%。细胞增殖检测结果显示,7 d内nHA/PEEK-AgNPs组在各个时间点的细胞增殖情况均明显优于PEEK组(P<0.05)。此外,nHA/PEEK-AgNPs具有较好细胞相容性和成骨活性。RT-PCR结果显示,14 d内,和PEEK相比,nHA/PEEK-AgNPs组细胞的Runx2基因表达水平和Col1基因表达水平均随着时间增加而上调(P<0.05),说明nHA/PEEK-AgNPs复合支架材料能够显著提高成骨相关基因的表达。nHA/PEEK-AgNPs三维多孔支架有望在骨组织工程修复领域得到应用。

关键词: 3D打印, nHA/PEEK-AgNPs, 三维多孔支架, 抗菌性, 生物相容性, 成骨活性

Abstract:

Nanometer hydroxyapatite (nHA) and poly(ether-ether-ketone) (PEEK) powder is intensively mixed to develop and prepare nHA/PEEK-AgNPs composite porous scaffolds by fused deposition modeling (FDM) 3D printing technology. Then, dopamine oxidation polymerization and silver nitrate chemical reduction were used to form silver nanoparticle coating on the surface to prepare nHA/PEEK-AgNPs composite porous scaffolds. The scaffold had a unique three-dimensional porous structure with a surface contact angle of about (33.2±3.65)(°), showing good hydrophilicity. Mechanical test results showed that the maximum compressive strength of nHA/PEEK-AgNPs porous scaffolds was (47.4±3.9) MPa, which was significantly higher than (36.3±7.3) MPa of PEEK group. At the same time, there was no significant difference in the maximum elastic modulus between the PEEK group and the PEEK group, indicating that the mechanical strength of the composite was enhanced compared with that of the PEEK porous scaffold. The antibacterial test showed that the antibacterial rate of Escherichia coli and Staphylococcus aureus was (89.4±2.4)% and (85.8±4.4)%, respectively. The results of cell proliferation assay showed that the nHA/PEEK-AgNPs group had significantly better cell proliferation than the PEEK group at all time points within 7 days (P<0.05). In addition, nHA/PEEK-AgNPs had good cell compatibility and osteogenic activity. The results of RT-PCR showed that the expression levels of Runx2 gene and Col1 gene in nHA/PEEK-AgNPs group were up-regulated over time compared with PEEK group within 14 days (P<0.05). These results indicated that nHA/PEEK-AgNPs composite scaffolds could significantly improve the expression of osteogenesis-related genes. nHA/PEEK-AgNPs three-dimensional porous scaffolds are expected to be applied in the field of bone tissue engineering and repair.

Key words: 3D printing, nHA/PEEK-AgNPs, Three-dimensional porous scaffold, Antibacterial, Biocompatibility, Osteogenesis

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