Shorter ADRs Less Facet Joint Stress????

[Michelle Maree]

Hi Mark nice to hear from you,
What is a trial implant? Is it something the surgeon fits into the space before the real one to test the size?
How much distraction can you get away with without damage to nerves, ligaments facet joints etc? I know this is probably individual, but at what point does the surgeon go, "o.k, well, this is looking a bit riskier than I thought. I might have to fuse? "
How often does this actually happen? Is it more a wait untill after and see?
How long IYHO before facet replacement is routinely used in the case of facet related problems after ADR instead of revision surgery?
Thanks,
Michelle.