Rudy,
I would hesitate to give you any specifics and would just point out the obvious – that you need to find a surgeon that has performed many of these tricky procedures.
Here are a few relevant articles – the first one by a surgeon you may want to contact:
http://www.touchbriefings.com/pdf/1680/mcafee.pdf
Revision open anterior approaches for spine ... [Spine J. 2007 May-Jun] - PubMed - NCBI
Analysis of reoperations after surgical t... [Cent Eur Neurosurg. 2009] - PubMed - NCBI
Also, search this community. There are, unfortunately, many patients who have had revisions, so pls reach out to them by private message. Search:
ADRSupport Community - Search Forums
I hope this helps some.