We've had some success with this, though it's not a permanent fix, and it's so far only available in Boise, Idaho. Might be worth looking into though, for some people! My husband started this and was at a 7-8 on the pain scale. After 3 months he was down easily to a 3-4, was functioning better and was off his heavy-duty pain meds. The downside is that when he took a month long break the pain came back.
Anyway, it's worth a mention!