Barrier membrane:
Generally, there are two types of membrane used, resorbable and non resorbable.
Non resorbable expanded polytetrafluoroethylene(ePTFE) membrane can be used to maintain the alveolar ridge after extraction. A paper by the Lekovic V et al, looked at the use of a resorbable membrane compared to a control site in 16 patients. A polyglycolide⁄ lactide membrane was placed and assessed after six months. The experimental sites showed significantly less loss of alveolar bone height, more internal socket fill and less horizontal resorption of the ridge. Importantly, there were no exposures[9]. Therefore, it seems that resorbable membranes should be preferred over nonresorbable.
Porcine collagen membranes have an excellent combination of characteristics. The membrane is biocompatible, resorbable, it is easy to use, it has suitable occlusive qualities, and it can be left exposed on relatively small spaces. The weakness of the membrane is a lack of rigidity, requiring support from a bone replacement graft, and one layer of the membrane may not withstand wide exposures. Therefore, two layers of the membrane should be used in the exposed area. The biocompatibility of this membrane makes it an excellent choice for use in esthetic
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This technique have a positive results, it has not been documented