When could an artificial disc replacement be used?

Disc Replacement: In my experience disc replacement is best done when you have pure back pain. You would also do best when there is only disc degeneration or a contained disc herniation that has failed all conservative treatment. You also should not have any arthritis of the facet joints.

There are specific: There are very specific indications for this surgery & very specific contraindications. It is used when a cervical or lumbar fusion is being considered. It has been shown to be equivalent in outcome to a fusion but not better with the current follow up studies available. The benefits are still theoretical. It cannot be used with active infection, bone density loss, instability, deformity, ....

Needs detail: This is a highly customizable question, depending on health, circumstance, goals, weight, family history, stability, payor, and needs thorough diagnosis and analysis.