QUESTION:L5/S1 ADR or FUSION?

[Michelle Maree]

Hi Guys,
I would like to know your opinion on whether or not L5/S1 is worth putting an ADR or better off fusing? Generally speaking and in my case.

I am considering further surgery at this level after microdiscectomy and now severe DDD with back pain.With only 4.5 mm disc height in the middle and possibly nearly bone on bone at the front and back of the vertebra. I have mild facet hypertrophy on one of my three radiologist reports,but the others didnt mention it. I feel I may have some facet pain though. Not yet tested. Discs above look really healthy and plump. I have no nerve pain.
So I am trying to decide : Is ADR too risky because of limited disc height and possible facet problems? Will the extra movement cause more pain? And fusion better for me as discs above look healthy enough for now. And also L5/S1 is said to have limited motion anyway.
I would greatly appreciate your thoughts.
Michelle.