关键词: 纳米管, 钛, 银, 纳米结构, 微生物敏感性试验, 细菌黏附

Abstract: Abstract: Objective To detect the inhibitory effect of siliver nanoparticles loaded titanium nanotubes on staphylococ⁃ cus aureus, and provide a theoretical basis for implant local application. Methods Orderly arrangement of titania nano⁃ tubes produced by anodic oxidation, loaded silver nanoparticals by situ replacement. Scanning electron microscopy (SEM) and transmission electron microscopy(TEM) were used to detect the morphology topology of silver nanoparticals, titanium nanotubes and siliver particals loaded titanium nanotubes. The minimum inhibitory concentration of silver nanoparticles was calculated. The antibacterial of planktonic bacteria was detected 1 day, 3 days and 5 days after culturing staphylococcus au⁃ reus on siliver particals loaded titanium nanotubes. The inhibitory bacterial adhesion properties were detected by scanning electron microscopy. Results The uniform and orderly diameter of 80~120 nm TiO2 nanotubes were prepared under 18 V voltage, loaded diameter of 20 nm silver nanoparticals, which effectively inhibited adhesion and proliferation of staphylococ⁃ cus aureus. Conclusion Titanium nanotubes produced by 18 V have a stronger drug loading capacity. The 100 mmol/L sil⁃ ver nanopartical solution loaded nanotubes can effectively inhibit staphylococcus aureus adhesion and proliferation within three days.

Key words: nanotubes, titanium, silver, nanostructures, microbial sensitivity tests, bacterial adhesion