Non resorbable membrane vs collagen membrane for GBR?


Want to open a discussion about membrane. For a Guided Bone Regeneration procedure, in general, which in your experience provides a better barrier and is more effective: non-resorbable membrane or a resorbable collagen membrane? Do any of the benefits of non-resorbable outweigh the potential increased risks since it requires a second surgical procedure to remove? Also, if the membrane becomes exposed to the oral cavity, which has a greater chance of failure?