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Alagarsamy Karthik,Vishwakarma Vinita,Kaliaraj Gobi Saravanan,Kanagasabai Viswanathan,Ramasamy Sathiskumar 한국세라믹학회 2022 한국세라믹학회지 Vol.59 No.4
In this study, the diff erent weight percentages of ZrO 2 –Ag-reinforced HAp were prepared by the planetary mill and cal- cinated at 800 °C for 5 h. Synthesized nano-composites evolved the hexagonal phase of HAp in addition to ZrO 2 and Ag peaks. Raman spectroscopy confi rmed the high-intensity band of PO 4 −3 group and major bands of Zr and Ag. Staphylococ- cus epidermidis and Pseudomonas aeruginosa bacterial growth were arrested in HA20Zr10Ag nano-composites evaluated by in vitro antibacterial activity. Hemocompatible behavior of the reinforced HAp revealed that the nanocomposites was non-hemolytic with distinct RBC morphology and this eff ect was more pronounced while increasing ZrO 2 concentration. Biocompatibility studies, such as protein adsorption, cell viability, fl uorescence staining, mineralization, and quantifi cation of BMP-2, were analyzed with MG-63. The nanocomposites have adsorbed a high amount of proteins (~ 300 to 700 μg) from the serum. MTT assay revealed the percentage of the viability of the cells was ~ 70% to 80%. In vitro cytotoxic behavior of MG-63 cells illustrated that HA20Zr10Ag nanocomposites expressed polygonal structure with elongated morphology by Alexa Fluor 488 phalloidin and DAPI staining. Similarly, nano-composites powder proved its mineralization capability through intracellular calcium uptake up to the 5th day of MG-63 incubation. While, BMP-2 expression was slightly higher in HA20Zr10Ag nano-composite at 5th day of incubation. From the results, it is illustrated that HAp with 20 wt% of ZrO 2 and 10 wt% Ag nanocomposites has an important role in osteoblastic bone formation.