Indicative models for the properties of biological materials for the secon_dental assiut. 20 December 2020 https://drive.google.com/file/d/1IzWXPqmWr4ZK04_U_mffFQVR-2ppb4ZD/view?fbclid=IwAR3h0y5rS-9ZBVqrIyHjfj7FOBhrXAZZeugeTYVye3aIAK1BYlgH-XBm5h4