Figure 2: Osteogenic matrix cell sheet transplantation with an autogenous irradiated bone graft. Single and double arrows indicate grafted bone (irradiated bone) and the host femur, respectively. Asterisk indicates osteogenic matrix cell sheets. (a) Irradiated bone was fixed to the host femur using Kirschner wire. (b) Two osteogenic matrix cell sheets were wrapped around the grafted bone without suturing.