Thank for the query.
The first issue to be addressed is if the MRI
findings are due to the fall or if that were already there before the fall.
Facet hypertrophy may be constitutional or due to degeneration. Disk bulge and herniation may be caused by trauma, but it could be already there - did you ever had any sort of left sciatic pain?
True disk herniation usually causes an inflammatory reaction that may lead to its resorption and cure. However, if their parent disk is already dessicated, they won´t resolve. Facet hypertrophy is a permanent condition due to its origin.
Just a comment on your MRI report - it is unlikely that a L4-5 disk herniation might cause S1 nerve root compression
. This is because, within the L5 lateral recess, resides the L5 root, not S1 (just a minor mistake)