[Preparation and structural detection of antibacterial hydroxyapatite coating material on Ti implant].
OBJECTIVE
To investigate the method for preparing antibacterial hydroxyapatite coating material on Ti implant,and detect its surface feature, chemical composition and the crystal structure.


METHODS
The antibacterial hydroxyapatite coating material which contained silver-zirconium phosphate antimicrobial was prepared on the Ti implant by using vacuum plasma spraying technology. Samples were divided into 4 groups according to weight percent of the antimicrobial: group A (0), group B (2%), group C (5%) and group D (10%). The surface feature of each sample was observed under scanning electric microscope. The chemical composition and the crystal structure was detected by electronic probe and X-ray diffraction method respectively.


RESULTS
The surface feature of each sample showed globular granule with caky structure and air pore. The crystal structure of group A, B, C mainly showed characteristic absorption band of Ca10(OH)2(PO4)6 which degraded while antimicrobial content increased. Except Ca10(OH)2(PO4)6 and CaZr (PO4)2, Na6CaP2O09 also appeared in group D. Ag+ could not be detected by electronic probe in group A and B. The contents of Ag+ in group C and D were similar.


CONCLUSIONS
The antibacterial hydroxyapatite coating material which contained silver can be prepared on the Ti implant by using vacuum plasma spraying technology. The appropriate weight percent of the antimicrobial was 5%.
Zhu
Zi-Yuan
ZY
Department of Prosthodontics, College of Stomatology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Research Institute of Stomatology, Shanghai 200011, China. yuan1588@sina.com
Zhang
Fu-Qiang
FQ
Zheng
Xue-Bin
XB
D000900:Anti-Bacterial Agents / Q000737:chemistry*; D020099:Coated Materials, Biocompatible; D017886:Durapatite / Q000737:chemistry*; D008422:Materials Testing; D015394:Molecular Structure; D010710:Phosphates; D019736:Prostheses and Implants; D018030:Silver Compounds; D013499:Surface Properties; D014025:Titanium; D014618:Vacuum; D014961:X-Ray Diffraction; D015040:Zirconium
D000900:Anti-Bacterial Agents; D020099:Coated Materials, Biocompatible; D010710:Phosphates; D018030:Silver Compounds; C027006:zirconium phosphate; D017886:Durapatite; D015040:Zirconium; D014025:Titanium; C039072:silver phosphate