Faravahar...
There are several different grading systems that classify the degree of your facet arthrosis. In general, moderate to severe arthritis of the facets are a contraindication for ADR surgery.
If you already know you have this condition, I would work extra hard on getting the affected levels classified.
Another general statement: Euro docs will tend to be more aggressive in recommending ADR for patients with facet arthrosis. Some patients who have this regret getting ADR -- especially some of the ProDisc patients.
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Terms:
facet arthrosis
facet arthritis
arthritic facet
facet hypertrophy
contraindication
facet complications
You get the point. This should get you started.