Bone graft is a surgical approach in dentistry that allows implant placement even if the patient initially does not have enough bone (in quantity and quality) to get a fixed denture. Bone graft is always made when implants are desired. The reason why a bone graft becomes necessary is usually bone loss. Bone loss usually occurs when one or more lost teeth are not replaced for an extended period of time, the bone loses its function, since no chewing force is produced and this bone section becomes superfluous and the bone therefore regresses. Also, osteoporosis can lead to bone loss. Implantation can only be done in a bone that has adequate quality and quantity, if that is not given, the bone must be replaced. The bone can be replaced by means of bone substitutes (BioOss), the own bone of the patient, or by the combination of both, but these can only be used if the blood supply to the bone is good. If this is not given, a bone transplant is the only reliable solution.