[Lyophilized dura in covering of filled sites].

When closing is difficult to obtain in a filled site at the end of the surgical phase, the use of dried-dura-mater (connective tissue of the brain external envelope) can be very helpful. Placed under a full thickness flap or sutured on a periosteal site, it is, after a week, already continuous with tissues and helps for a good closing. The dura-mater can be shaped and cut differently according to specific clinical situations.