Hi
I finally had my Maverick ADR removed and fused and thought it best to start a new post to explain how I got it out.
I travelled to Brasil to have surgery with Dr Luiz Pimenta at the Santa Rita hospital in Sao Paulo at the end of July 2009. Dr Pimenta was unlike any other surgeon I dealt with in the way he treated me with his willingness to talk to me on the phone and email me directly. He was the only surgeon to give me any confidence that he could remove the disc for me and also had experience with ADR removals. It really was extremely comforting with all I was going thru.
The surgery consisted of a lateral(XLIF) approach to the disc space which was thru a horizontal cut about 2inches long a few inches above my hip.
A hemi-corpectomy (partial verebra removal) was done to remove a section of Spine vertebra the same shape of the bottom keel of the ADR to expose the keel fully. With my case the top keel was on the angle and the bottom disc was resonably level so the approach was much easier with the bottom keel so the bottom vertebra was cut instead of the top one.

OUCH!
With the bone out the keel can be accessed without having to distract the vertbra again. The Maverick ADR also has 2 small holes on each plate which enabled him to screw a small screw into 1 of the holes to have something to grab onto to pull the endplate out.
With the bottom plate out there is enough room for the top keel to be grabbed onto to remove thru the gap. (If only it was that simple

)
By cuting a decent section of bone out neatly, the bone can also be put back inplace after to fuse as well, keeping the strength in the vertebra. Usually this is held in place with a small screw but mine didnt need one. By removing a decent section it also saves cracking the vertebra which can happen if they dont cut enough away.
I then had an XLIF fusion cage implanted to fuse the anterior section of the spine.
Cause of the Scoliosis I also needed to have a minimally invassive PLIF as well. Sometimes the revisions can be done with a XLIF plate and pedicle screws which go thru the same incision thru the side instead of having to cut the back muscles with a PLIF which would be alot less painful.
The PLIF was done thru a 2inch and 3 inch incision's. He had to cut one side longer due to the scholiosis to straighten it up.
The lateral approach goes straight thru the Psoas muscle which is probably the biggest risk with the lateral operation as there are alot of nerves in there. Just the dilation of the Psoas muscle often causes leg weakness and nerve irritation. During the surgery they were guided by Nuvasive EMG nerve monitoring so I had alot of shaven areas all over my body from the sensors.
I am unsure which nerve was disturbed with mine as the area's affected are very close to each other but I have some parasthesia at the top of the inside of my left leg. Luckily it doesnt effect my leg movement, just feeling. It doesnt cause pain but it also doesnt feel good when touched. It was something I was well aware of and prepared for so dont mind it at all. Its not something that is of concern and I have been told that no nerves were touched so the parasthesia should resolve itself with time.
The resulting fusion has straightened my spine and corrected the scholiosis and also restored the correct lordosis which was great to see. As soon as I was up walking the morning after surgery I felt much taller and straighter and was amazed to see the difference in the mirror. I was even more excited to see the xrays a few days later.
I spent 3 days in hospital after surgery which was shorter than I immagined, especially after what was done and was able to start reducing my opiates within a week of the surgery.
This is definately a much more difficult and dangerous surgery than puting an ADR in and should be thought about prior to ADR surgery. I wish I had gone straight to a fusion instead of thinking I could always have it fused later if the ADR failed. What a mistake that turned out to be. ADRs are designed not to come out easily and I definately found that out the hard way.
I hope some people are helped by this.
Mark
March 26, 2009 
July 2009 Revision

Bookmarks