Dr. Thank you so much for your time . I know that they kept my vertebra to be fused with the cage . During my first follow up I saw my neurosurgeon’s partner and she didn’t not know if a plastic cage ,or a metal cage was used . I will call to verify. I know that my nuerosurgeon just so happens to be one of the conservative neurosurgeons So I am told by her partner . I just didn’t want to stop lifting weights and running because of my surgery . I will let you know exactly what cage was used . Thank you again got your time .