(a)
(b)
(c)
(d)
Figure 5: Primary osteoblast viability evaluation. (a) Osteoblasts seeded on collagen type I after seven days of culture. Fluorescence micrograph depicting viable cells as bright green dots immersed at multiple collagen sites. (b) Osteoblasts seeded on HA matrix after seven days in culture. (c) Osteoblasts seeded on bovine bone matrix after seven days in culture. (d) Fluorescence micrograph of osteoblasts on porous silicon after seven days in culture.