• 1. Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, P.R.China;
  • 2. School of Life Sciences, Central South University, Changsha 410013, P.R.China;
  • 3. Second Xiangya Hospital, Central South University, Changsha 410011, P.R.China;
YU Shu, Email: yushu@csu.edu.cn
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Silicon carbide (SiC) film and silicon dioxide (SiO2) film were deposited on the surface of carbon/carbon composite (C/C) by low pressure chemical vapor deposition (LPCVD). The biocompatibility of the three carbon-based composites, e. g. C/C, C/C-SiC, C/C-SiO2 were investigated by cytotoxicity test, cell direct contact and cell adhesion experiments. Cytotoxicity, cell direct contact and cell adhesion showed that the three materials had no toxic effect on mouse fibroblasts (L929 cells). However, the particles dropped off from the three materials had a great impact on evaluation accuracy of the thiazolyl blue (MTT) test. More the particles were lost, more growth inhibition to L929 cells. The evaluation accuracy of MTT method can be kept with the filtered extract of materials. Furthermore, the results of surface particles shedding experiment showed that the amount of surface particles shed from C/C-SiO2 was the most, followed by C/C and C/C-SiC in 72 hours. Particles shedding curves showed there was a peak reached at eighth hour and then declined to the thirty-sixth hour. The filtrate analysis showed that there was no ion exchange between the three materials and simulated body fluid (SBF) solution. The results of this study on biocompatibility of carbon-based composites have certain guiding significance for their future application in clinical filed.

Citation: YIN Yanxiong, YU Shu, LI Yunping, WU Qiang, LI Xiao, ZHONG Hui, DENG Youwen, XIAO Tao, LIU Lihong, GUO Xiaoning. Study on biocompatibility of carbon-based composites. Journal of Biomedical Engineering, 2018, 35(5): 740-748. doi: 10.7507/1001-5515.201708014 Copy

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