Hi John and welcome
Your symptoms sound an aweful lot like a tear in the L4-L5 or L5/S1. Your bulge at L5/S1 sounds like mine and turns out it was a herniated disk. You might want to think about the cages. Before you do ANY surgery, I would recommend a discogram/CT scan. That is how my hernia, tears, fissures and ruptures were found (the MRI showed none of that!).
JUST SCIATICA. oooooooo that makes me so mad!

Apparently, he has never had this affliction. Because anyone who HAS had sciatica, would NEVER say "just sciatica". yikes. Sciatica is indicative of L4/L5 & L5/S1 nerve impingement...or herniated disks (we are talking generalizations here).
Let's assume you DO have a tear....the IDET procedure may be an option.
For a contained herniated disk.....the Nucleoplasty procedure is probably the best.
For a (regular?) herniated disk....there are discectomys and laminectomys.
All of the above procedures are known as "non-invasive" (in who's book?) hehe The IDET and Nucleoplasty use larger gauged needles and they go in from your side. Largest hole is like from a 17 gauge needle. The "ectomy" procedures do involve incisions (anywhere from an inch to 4 inches...I think) located where the disks are.
To me....getting cages means putting metal into your back. That's just not right....ESPECIALLY for a first procedure! Not unless you broke your back or some emergency-type thing happened. You've got to look into other non-invasive treatments. Get your discogram/CT scan. THEN....you will be MUCH more ready to make a well-informed and satisfying decision.
Good luck to you.
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successtory
Oct 2000: Repetitive Stress Injury-Inverted Hernia
Feb 2001: MRI. Shows only slight bulge at L4-L5
Dec 2001: Discogram/CT scan shows Inverted Hernia at L5-S1. L4-L5 & L5-S1 ruptured in all 4 quadrants. Unable to walk.
Feb 2002: IDET, Nucleoplasty, Intra-Discal Injections
Sept 2002: Rated in the top 10% for successful patients. Retraining for new career.