Is there a disc less prone to injure facets? Keel vs. non?

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Thank you Sharman. My pain's getting worse and I'd probably have fusion at the L5-S1 level and ADR at L4-L5 (or more pending a discogram). I just get the creeps at the L4-L5 level as revision's complicated by blood vessels and scar tissue. Hmm, wonder how long Active-L w/be approved in the States. (Money is an issue but extensive DDD knocks me outta trials - thanks). You take care - Allan