Ferulic acid and PDMS modified medical carbon materials for artificial joint prosthesis.

Medical carbon material has been extensively studied due to their excellent biological and mechanical properties. However, the dissociation of the surface carbon particles greatly limited the application of medical carbon material (MCM). To overcome this defect, we introduced the polydimethylsiloxane, a polymer-coating material (PCM) that possesses acceptable biocompatibility, into medical carbon material to prevent the shedding of carbon debris. Additionally, to reduce inflammatory reactions and increase surface hydrophilicity, ferulic acid, also called Chinese medicine coating material (CCM), was used to modify the surface of polymer-coating material. We investigated the proliferation and adhesion of NIH-3T3 cells onto MCM, PCM and CCM in vitro. We showed that CCM exhibited excellent biological activity to promote cell growth. Twelve weeks after CCM implantation, bone defects were repaired, and the material showed acceptable chemical stability. The results indicated that the CCM composite possesses excellent mechanical property and favorable biocompatibility, which can be used for clinical bone repair.