Dissertation > Medicine, health > Oral Sciences > Oral orthotics > PROSTHETIC

Preparation and Antibacterial Effect of Silver-Hydroxyapatite/Titania Nanocomposite Thin Film on Titanium Against Oral Bacteria

Author XuWei
Tutor XianSuQin
School Sichuan University
Course Clinical Stomatology
Keywords Pure titanium Antibacterial effect Surface Modification Nano - hydroxyapatite Silver Titanium dioxide
CLC R783.6
Type Master's thesis
Year 2006
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Objective: In order to reduce the occurrence of infection around the implant , formed on titanium surface nanocomposite inorganic antimicrobial layer , and analysis of the surface structure and physico-chemical properties of the antimicrobial layer . Examine its antimicrobial properties of common oral bacteria . Methods : by dipping in rough pure titanium surface preparation containing silver hydroxyapatite / titania nanocomposite inorganic antibacterial layer . By scanning electron microscopy , X-ray diffraction , X - ray energy spectrum analysis, and surface scanning technology detects rough titanium and antimicrobial layer surface morphology and chemical composition. Foil method against Staphylococcus aureus , Escherichia coli , Streptococcus mutans , Porphyromonas gingivalis Aeromonas and antibacterial activity of Fusobacterium nucleatum , using scanning electron microscopy qualitative observation antibacterial layer of Staphylococcus aureus , Escherichia coli , deformation Streptococcus Porphyromonas gingivalis Aeromonas anti- adhesion properties . Results: silver hydroxyapatite / titania nanocomposite inorganic antibacterial layer surface to form a small gap kept pure titanium surface roughness , uniform distribution of various elements , calcium and phosphorus ratio close to the mineral composition and human . Staphylococcus aureus and Escherichia coli antibacterial rate reached more than 99% , Streptococcus mutans , Porphyromonas gingivalis the Aeromonas and nuclear Fusobacterium antibacterial rate close to 90% . Scanning Electron Microscope results show that a better anti - adhesion properties . Conclusion: The extraction method in rough titanium surface successfully prepared silver nanocomposite coating of inorganic antimicrobial agent , good physical and chemical properties of the coating material , oral bacteria strong inhibitory effect and better

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