Off the top of my head, no but that doesn't mean that it hasn't happened. On the other hand, one of the compelling arguments for ADR is that the motion at the segment with an ADR would tend to reduce the likelihood of adjacent segment degeneration when compared with a fusion. Much over 70, you have a statistical likelihood of passing on of natural causes before adjacent level problems could catch up with you.
That's not the only reason to get an ADR. If nothing else, the recovery for ADR surgery tends to be faster than for fusion but it is a big argument to drive serious thought about which surgery you should get if you're in your 70's or later.
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Laura - L5S1 Charitee
C5/6 and 6/7 Prodisc C
Facet problems L4-S1
General joint hypermobility
Jim - C4/5, C5/6, L4/5 disk bulges and facet damage, L4/5 disk tears, currently using regenerative medicine to address
"There are many Annapurnas in the lives of men" Maurice Herzog
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