 In the presence of critical-sized bone defect whose defect size is more than 2.5 cm, bone will suffer a healing disturbance. In treating these conditions, the conventional method were vascularised bone grafting and bone transport. But the existing methods of treatment have many weaknesses Vascularized bone graft is a procedure with a high level of difficulty. Hence not every orthopaedic surgeon were able to perform it. It also takes more operating time and its failure rate is also quite high. 