People tend to use biodegradable materials in medical materials with the development of equipment. Polylactic acid is a polymer synthesized by polymerization of lactic acid. The production process of polylactic acid is pollution-free, and the product can be biodegradable, realizing the circulation in nature. The production is an ideal green polymer material. Most people study the cytotoxicity, biocompatibility, the corresponding value of the cell, and there are also combining silver ions and biological materials to achieve the antibacterial properties. But for nanoscale silver ions, small size and liquid into the cell in the cell, silver ions combine with mitochondria cells to produce toxicity. In this paper, antibacterial peptides were applied to polylactic acid 3D printing scaffolds, which had a long-term antibacterial effect and had no toxicity to cells.
Polylactic acid 3D printing stand is made of porous material, which is coated with polyhydroxyapatite, dopamine, gelatin and antimicrobial peptides by XPS, SEM and contact Angle, cell culture, such as antibacterial performance tests, proved that the long-term antibacterial effect of 3 d printing stent materials, the synthesis of poly (lactic acid) (PLA) and proved that the antibacterial peptide no toxicity to cells, good antibacterial properties.