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- W2049060103 endingPage "1652" @default.
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- W2049060103 abstract "In order to improve the bioactivity and biocompatibility of titanium endosseous implants, the morphology and composition of the surfaces were modified. Polished Ti–6Al–4V substrates were coated by a laser cladding process with different precursors: 100 wt.% HA and 25 wt.% SiO2-HA. X-ray diffraction of the laser processed samples showed the presence of CaTiO3, Ca3(PO4)2, and Ca2SiO4 phases within the coatings. From in vitro studies, it was observed that compared to the unmodified substrate all laser cladded samples presented improved cellular interactions and bioactivity. The samples processed with 25 wt.% SiO2-HA precursor showed a significantly higher HA precipitation after immersion in simulated body fluid than 100 wt.% HA precursor and titanium substrates. The in vitro biocompatibility of the laser cladded coatings and titanium substrate was investigated by culturing of mouse MC3T3-E1 pre-osteoblast cell line and analyzing the cell viability, cell proliferation, and cell morphology. A significantly higher cell attachment and proliferation rate were observed for both laser cladded 100 wt.% HA and 25 wt.% SiO2-HA samples. Compared to 100 wt.% HA sample, 25 wt.% SiO2-HA samples presented a slightly improved cellular interaction due to the addition of SiO2. The staining of the actin filaments showed that the laser cladded samples induced a normal cytoskeleton and well-developed focal adhesion contacts. Scanning electron microscopic image of the cell cultured samples revealed better cell attachment and spreading for 25 wt.% SiO2-HA and 100 wt.% HA coatings than titanium substrate. These results suggest that the laser cladding process improves the bioactivity and biocompatibility of titanium. The observed biological improvements are mainly due to the coating induced changes in surface chemistry and surface morphology." @default.
- W2049060103 created "2016-06-24" @default.
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- W2049060103 date "2011-12-01" @default.
- W2049060103 modified "2023-09-26" @default.
- W2049060103 title "Osteoblast interaction with laser cladded HA and SiO2-HA coatings on Ti–6Al–4V" @default.
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- W2049060103 doi "https://doi.org/10.1016/j.msec.2011.07.009" @default.
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