Successful Osteoinduction by Cell-Macroporous Biphasic HA-TCP Ceramic Matrix
To improve the potential of osteogenic repair, we developed macroporous biphasic hydroxyapatite-tricalcium phosphate (HA-TCP) ceramic and evaluated its efficiency as a scaffold for tissue engineered bone regeneration, which allows for appropriate cellular attachment and proliferation with osteogenic differentiation by evaluating ectopic bone formation ability after the implantation of cell-matrix construct in the skid mice subcutaneous pouches for 3 weeks. The macroporous biphasic HA-TCP ceramic matrix, with an average porosity of 86% and 200 µm mean pore size, provided favorable conditions for the attachment of cultured bone marrow derived osteoblastic cells along its inner surfaces in a filed up pattern and the active proliferation of them. The implanted cell-matrix constructs in the subcutaneous pouches induced favorable ectopic bone formation without any remarkable inflammatory reactions. These findings suggest that the biphasic HA-TCP ceramic matrix with macroporous structure has excellent biocompatibility, and that it allows for favorable cellular attachment with the acceleration of cellular proliferation and osteogenic differentiation support as well. Thus, with the controlled biodegradability, the biphasic HA-TCP ceramic may be a promising scaffold for tissue engineered bone regeneration technology.
Xingdong Zhang, Junzo Tanaka, Yaoting Yu and Yasuhiko Tabata
H. I. Shin et al., "Successful Osteoinduction by Cell-Macroporous Biphasic HA-TCP Ceramic Matrix", Key Engineering Materials, Vols. 288-289, pp. 245-248, 2005