4 weeks to 4 months
Bone graft material will act as a catalyst to begin bone growth via osteoconduction, osteoinduction, or osteogenesis.
In osteoconduction, the grat acts as a scaffold, as blood vessel via neovascular genesis will bring in the bone cell, proliferate, differentiate, and mature. In osteoinduction, it will induce the bone to form and mature similarly. Osteogenesis only occurs with autogenous graft.