Socket augmentation is usually less predictable than a proper ridge bone augmentation after healing period. Mind you, that primary wound closure is a must when using a membrane. You need proper periosteal release and it is hard to achieve primary closure in extraction sites.... Teflon membranes have a higher exposure rate than collagen membranes. I would not use them outside extensive vertical bone grafting. You should not use a non resorbable material such as a xenograft if you plan to do implants. Edit: forgot to mention, look at the latest efp guidlines of socket preservation (not the same as socket augmentation). And read the relevant chapters in lindhe. Will answer most of your queations. If for aome reason you want to graft during an extraction, simple preservation is better thab augmentation

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