The pericardium membrane
is a structured membrane, where many molecular links among its constituents (collagen and elastin) are preserved.
 
Its protection time is quite long: 3-4 months.
After this time degradation begins, and the membrane is no longer occlusive.
 
Compared to a standard collagen membrane, its protection time is far longer.
However, it can be handled just as easily as a collagen one.
 
Fixation is not necessary
but recommended if stability is uncertain.