Is it necessary to put a resorbable membrane over the Titanium mesh for bone augmentation

Dr. Huang asks:
Is it necessary to put a resorbable membrane over the Titanium mesh + bone grafting for GBR before dental implantation?
Periosteum is a GBR membrane -like tissue for bone augmentation, isn't it?
Are bone graftings with allograft/Xenograft or autogeneous grafts different approaches for this GBR technique? Comments....