Abstract
Background
Due to their tailored porous texture, breathability and flexibility, carbon cloths (CCs) are good scaffolds for biomedical application. However, biocompatibility of CCs depends on their physic-chemical properties. Calcium phosphate ceramics (CaP) are well known for their use in orthopaedic field. So, carbon cloth-reinforced CaP composites are promising bioceramic materials for bone regeneration.
Methods
CaP coating are performed using sono-electrochemical deposition method. The electrolyte consisted in an aqueous solution of calcium and phosphates precursors. CC was used as work electrode in three-electrode system. SEM, TEM, XRD, 1H and 31P MAS NMR and FTIR spectroscopies were performed to characterise the deposits. In vitro biocompatibility of CCs with and without coatings is tested with human osteoblasts.
Results
The current density influences the morphology and the chemical composition of deposit: it consists mainly in carbonated hydroxyapatite with plate-like shape for lower current densities and needle-like shape for the highest. A hydrophobic surface of CC with due to small amount of oxygenated functions leads to a poor biocompatibility.
Conclusion
The wettability of CCs is an important parameter of biocompatibility. Biomimetic CaP deposits obtained by sono-electrodeposition present a microstructure and a chemical composition close to the mineral phase of natural bone.
This work was supported by Region Centre project: bioactive hybrid materials for bone reconstruction. 2014–2016
