Although those approaches have been a great solution within the last few years, there are major drawbacks associated with both techniques. The use of autografts is painful, restricted to anatomical limitations, and, more importantly, related to donor-site morbidity because of possible infection and hematoma. On the other hand, allografts also present the limitation of accessing enough tissue for all the patients, the risk of rejection by the immune system of the patient, and the chance of infection together with the possibility of a disease contagion from the donor to the patient.