Hello @m0h1pp I am trying to understand what you are facing. Are you having a second reconstruction due to failure or perhaps poor initial surgery? And "filling" with free flap I don't understand as well. Typically the bone is replaced with bone and attached quality free flap which is meticulously connected to the blood supply to keep it all alive and healing. This entire procedure is highly technical and normally done at only a handful of centers in North America, Europe, and Asia although I understand some local surgeons try to give it a go as it were. I hope that isn't the case for you. Do you have some background?