There has been a lot of speculation that the decreased motion at L5S1 means that the fusion works better. In my personal opinion, motion isn't the sole determiner as the force across L5S1 is higher, more body weight on it than other higher levels. There's also stress to the SI joints to think of.
That said, this is only my opinion as I haven't seen a paper answering it either way. Anyone else?
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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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