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• W2527781010 abstract "Introduction: Hydrogenated (acetylene:C2H2) and silanized (tetra methyl silane:TMS) diamond-like-carbon coatings (DLC) are applied to titanium alloy to reduce surface energy, cell adhesion and hydrophilicity. The incorporation of silicon into DLC reduces its surface energy. It was hypothesized that surfaces that have high surface energy and high hydrophilicity favoured the adhesion and maturation of fibroblasts when compared with C2H2 and TMS coated substrates in vitro. This would help in achieving a seal at the prosthesis – soft tissue interface, thereby helping in reducing infection. Methods: and Materials: Fibroblasts were cultured on 10 mm diameter titanium alloy, C2H2 and TMS coated titanium alloy discs for 4 hours and 24 hours (2500 cells per disc). Cell area, adhesion plaque numbers, number of plaques per unit area (plaque density) and the total area of adhesion plaques per cell were analysed. The results were compared between experimental groups and controls at 4 and 24 hours. In order to measure the strength of adhesion of cells fibroblasts were cultured on discs (30 mm diameter)[machine finished and polished(Ra = 0.031)](density-300,000 cells per disc) for 4 and 24 hours with similar coatings and exposed to radial shear by flow (100 mls/min) of culture media over their surface. These discs were then stained and analysed using Photoshop (ver.5.5) and SPSS (ver.16). Mann-Whitney tests were used to calculate significance (p Results: At 4 and 24 hours, the number of adhesion plaques was significantly greater on control and C2H2 compared with TMS. At 4 hours, cell area on control discs was significantly greater than C2H2 and TMS. At 24 hours, cell area on control and C2H2 was significantly greater than TMS. Between 4 and 24 hours, the number of adhesion plaques increased significantly on all the surfaces. Cell area increased significantly on C2H2 and TMS between 4 and 24 hours. At 4 hours, shear stress needed to dislodge the cells was highest for polished C2H2 and least for titanium unpolished surface. Cells on polished surfaces in corresponding groups required higher shear stress to remove the cells than cells on unpolished surfaces. At 24 hours, cells on polished C2H2 required significantly higher shear stresses to detach them than cells on unpolished C2H2 and TMS (polished and unpolished). Cells on unpolished Ti required higher stress to dislodge than cells on unpolished TMS. From 4 to 24 hours, a significant increase in shear stress to remove the cells was required on all unpolished surfaces and polished C2H2. A significant correlation was seen between adhesion plaque density at 4 hours and shear stress. Discussion: This work supports the hypothesis that surfaces with high surface energy and high hydrophilicity lead to increased cell attachment and cell area. It also shows the correlation between adhesion plaque density and the shear stress needed to dislodge fibroblasts from bioactive surfaces." @default.
• W2527781010 created "2016-10-14" @default.
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• W2527781010 date "2011-05-01" @default.
• W2527781010 modified "2023-09-22" @default.
• W2527781010 title "FIBROBLAST ATTACHMENT ON DIAMOND-LIKE-CARBON COATED TITANIUM." @default.
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