This fusion technique sounds like the Optimesh fusions I saw many years ago at IITS meeting in San Diego. (International Intradiscal Therapy Society) They had a cadaver lab in which this technique was taught.
The mesh sac can be inserted endoscopically. It is then packed (inflated) by packing morselized bone. As I remember, the problem with this device is that the fusion rate is not that great. The implant may then function like an artificial disc. However, it is not very nicely controlled and can move, breakdown, etc...
Mark