and glycosaminoglycan (GAG), seeded with a small number of autologous basal cells before grafting [15]. This study was con-ducted following three main stages, today recognized by many researchers as the three main phases of tissue engineering approach: The first stage corresponds to the development of the material matrix membranes; in the second stage, the membranes are seeded with cells; and finally, in the third stage, the cell seeded membranes are grafted onto the tissue defect. The first stage, i.e., the development of the appropriate membranes based on collagen and GAG, was in fact, extensively explored, as the authors have analyzed