Biomaterials for medical purposes, namely, natural biomaterials for augmentation of bone and tissue for medical purposes; xenogeneic biomaterials, namely, natural biomaterials for augmentation of bone and tissue for medical purposes; xenogeneic biological tissue grafts, xenogeneic biomaterials for augmentation, regeneration or repair of bone and tissue, for medical, surgical and orthopedic purposes, namely, natural biomaterials for augmentation of bone and tissue for medical purposes; bone ce...