Fabrication and characterization of porous bioceramic composites based on hydroxyapatite and titania

摘要

Porous bioinert-bioactive composite ceramics were fabricated from hydroxyapatite and titania powder mixtures by using several techniques including involving the use of porogens such as carbon fibers, polyurethane (PU) foams or H_2O_2. The optimal titania content in the composite was 15 wt.%. Using H_2O_2 as pore creator, a porosity of 65 ±4% was achieved. The pores were shown to be interconnected with dimensions in the range 100-1000 μm. Young's modulus, bending strength and compressive strength of the porous composite were: 1.7±0.2GPa, 2.1 ±0.3MPa and 7 ± 1 MPa, respectively. This porous material can find applications as scaffold in bone tissue regeneration strategies.