Keano... that is a great point. Mechanically, if your discs are painful and they can resolve the mechanical issues, short term success is promising. However, you must be comfortable that the materials will stay where they put them and are really inert (in YOUR system), and will remain inert. There are a lot of issues that may only be answered by looking backwards over many years of experience (and we won't know how many years are appropriate until we get there.)
Mark
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