The use of nerve autografts has some disadvantages. This is accomplished through the use of Allografts and Autografts. The differences between autografts and allografts are discussed above. Autografts, or autologous grafts, are body tissues taken from the patient. Currently, the LARS ligament is the most comparable to both autografts and other synthetic grafts. Therefore allografts can be used more often in the same patient than autografts. In humans, artificially made columella may be produced as autografts from cortical bone. Occasionally, alternatives to animal tissue valves are used&colon; aortic homografts and pulmonary autografts. Subsequently, more studies and operations were carried out with autografts. Autografts, allografts and synthetic materials are the main types of materials used for cranioplasty. Autografts and isografts are usually not considered as foreign and, therefore, do not elicit rejection. Autografts are the transplant of tissue to the same person. Organs and/or tissues that are transplanted within the same person's body are called autografts.