Received a reply from Malte when I asked for a bit more detail on the fusion.

This is what the reply was...

I am curious about the procedure (Is it an ALIF fusion with an ADR above it,

or is it a minimally invasive PLIF?)

The fusion will and must be 360 degrees, ie anterior cage and re-alignment plus posterior screw fixation.

Another surgeon said a fusion could not be done from the front as my sacral slope was too steep? Yes, we agree and offered 360 degree fusion

Dr pablo clavel is nothing less than a disaster
 

I went to Dr Pablo Clavel at the Barcelona Spine Center and it was the most horrible experience you can get. He used these M6 discs and I had a failure a year later. Dr Clavel decided to leave me with these M6 discs inside my spine and even threatened to sue me because I spoke out. If you want to learn more about the story:
www.artificialdiscreplacementadr.com