I am scheduled for an ALIF procedure on June 6 and the doctor said it is with some kind of plastic spacer, which I have never really heard of, and some kind of bone growth stuff. My hospital stay is anticipated to be two days and there is no back brace involved. He is doing one level L5-S1. I have been in back pain for 10+ years. I fell off a roof in approximately the year 2000 during the holidays putting up Christmas lights for my partner (ironic as I'm Jewish).