Hi Andrea,
Welcome to the Spine Patient Society.
I'm glad that you have found the SPS useful.
In regard to spine surgery in general: you have to factor your quality of life into the equation. Most Spine Patients move forward with surgery when their pain and physical disability drastically changes their life (activities of daily living become difficult to do, can no longer work,
all conservative therapy has failed, etc.).
Spine surgery burns bridges to put it bluntly. Is spine surgery capable of helping Spine Patients with pathology of the spine and associate pain?
Yes. Does spine surgery inherently carry the risk of
not being successful?
Yes. Surgery alters the mechanics of one's spine
forever--surgeons and spinal devices can only replicate human physiology to a certain degree.
Ultimately, I believe it comes down to a very personal decision--if you can no longer see yourself living in your current situation (pain, physical disability, etc.), then it is time to move forward.
However, it behooves you to exhaust all conservative therapy before you even consider surgery.
Many Spine Patients assume that surgery will make them better and they'll be "as good as new." However, they forget to factor in how long they've been injured and, I hate to say, have widely unrealistic expectations of what spine surgery can do.
Dr. Pettine is a fantastic surgeon. I have spoken with his clinic in the past and I was quite impressed. Plus, Dr. Pettine is widely regarded as a first class guy and a surgeon that is advancing the field of orthopedics.
Alison already commented on ADR surgery at L3/L4 above; L4/L5 & L5/S1 are more commonly injured and, thus, require surgical intervention more frequently.
Once again, welcome and I wish you the very best.

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