| Regeneration of HA Coating on Porous ZrO2
Gradient Bioceramics |
Junwei Wu,1 Xiao Wang,1 Chunyan Wang,1 Xicheng Wei1, * and Renfu Quan2
Pages : 252-257
DOI : 10.1080/0371750X.2017.1412838 |
| Abstract |
| Themal decomposition and poor mechanical strength of hydroxyapatite (HA) restrict
its further application in the field of bone tissue engineering. A porous HA/ZrO2 gradient
bioceramics with regenerated HA coating was thus designed. Its porosity reached
about 70% with its compressive strength reaching about 14 MPa. The porosity and
mechanical strength were balanced appropriately by immersing the bioceramics for
three times using slurry concentrations of 60%, 55% and 50%, respectively. Through
analyzing the decomposition and regeneration behaviour of HA by DSC, Raman and
XRD, 4 mol mass of NaHCO3 heated at 900oC for 2 h was the optimum condition for
regenerating HA coating. The regeneration effect and process were also discussed.
[Keywords: Hydroxyapatite, Zirconia, Porosity, Regeneration, Biocompatibility] |
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