The Prodisc C Nova was redesigned from the Prodisc C to address multi-level due to potential concerns with this kind of vertebral fracture, or at least that's what I remember. I honestly don't know if it was ever approved by the FDA but Laura's second Prodisc C is actually a Prodisc C Nova put in by Bertagnoli.
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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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