BACKGROUND: Titanium mesh has good clinical effect in repairing skull defects, but due to the lack of bone induction ability, the titanium mesh has a poor integration with the bone tissue.
OBJECTIVE: To observe the biological properties of the gradient bioactive coating materials on the titanium surface in the skull repair.
METHODS: Osteoblasts were co-cultured with the titanium mesh with or without gradient bioactive coatings for 14 days, and then cell proliferation was detected using MTT method. Seventy-one patients with skull defects were enrolled, including 43 males and 28 females, aged 15-60 years, and were subjected to skull repair using the titanium mesh with (observation group, n=3) or without (control group, n=38) gradient bioactive coatings. During the postoperative follow-up of 12 months, the repairing effects and adverse reactions were observed in the two groups.
RESULTS AND CONCLUSION: (1) In vitro cell culture: the cell proliferative ability was increased significantly in the observation group as compared with the control group at 8, 10, 12 and 14 days after cell culture. (2) In vivo repair: the hospital stay and wound healing time in the observation group were significantly lower than those in the control group (P < 0.05), and at the final follow-up, the postoperative recovery effect was significantly higher in the observation group than the control group (P < 0.05). The titanium meshes were fixed firmly in the two groups, with no floating, infection and exposure. These results show that the titanium mesh with gradient bioactive coating has good biocompatibility and osteoinduction capacity. 相似文献
BACKGROUND: Studies have shown that the nano-hydroxyapatite coating on the surface of
zirconia has not only high strength and toughness, but also good
biocompatibility. It is an ideal substitute for hard tissue. However, the
coating is easy to fall off from the surface of zirconia, which is a fatal
defect. 相似文献
Ultra-high molecular weight polyethylene (UHMWPE) thin film was coated onto Ti6Al4V alloy specimens using dip coating method. Tribological performance of this coating (thickness of 19.6±2.0 μm) was evaluated using 4 mm diameter Si3N4 ball counterface in a ball-on-disk tribometer. Tests were carried out for different normal loads (0.5, 1.0, 2.0 and 4.0 N) and rotational speeds of the disk (200 and 400 rpm). UHMWPE coating formed in this study exhibits high hydrophobicity with water contact angle of 135.5±3.3° and meets the requirements of cytotoxicity test using the ISO 10993-5 elution method. This coating shows low coefficient of friction (0.15) and high wear durability (>96,000 cycles) for the tested conditions. PFPE overcoat on UHMWPE has further increased the wear durability of UHMWPE coating as evaluated at even higher rotational speed of 1000 rpm. 相似文献
A mechanism for the generation of the compositional gradient along the long axis for poly(ε‐caprolactone) (PCL)/poly(ethylene oxide) (PEO) blend under uniaxial thermal gradient was proposed by observations of the convection of polymer using graphite powder as a visual probe. The convection under the thermal gradient promoted the transfer of PCL into the liquid phase from the interface of PEO crystallites. The convex downward shape of the solid–liquid interface indicates the generation of the compositional gradient along the radial direction. By dissolution of PEO, a porous scaffold with a porosity gradient structure along the longitudinal direction was fabricated.