Gen Patton, pls see this post to see how to add a signature:
http://adrsupport.org/forums/showthread.php?t=11053
Your post implies that all ProDiscs will fail. This is not accurate. The majority have done well.
Unfortunately, we have seen catastrophic failures -- with many different disc designs. It's mostly a function of the surgeon's skill, training and placement of the discs.
The other BIG part is ensuring the patient is healthy enough to receive the disc; and rule out all other risks, like localized local infection. Ironically, the latter is the least understood and diagnosed; and I would argue the biggest contributor to localized vertebral disease and degeneration which can lead to subsidence.
Case in point:
https://www.wellbeingjournal.com/the...f-coconut-oil/
Cool journal, by the way.