
Guided Bone Regeneration (GBR) is a technique for bone reconstruction of alveolar ridge achieved with help of non resorbable or resorbable membranes. Bone grafts can be used in combination with membranes to further enhance the results. It may be used in conjunction with dental implants, in socket preservation, or in a staged manner. GBR procedures have been utilized for localized ridge augmentation as well as in reconstruction of larger areas. Both vertical and horizontal augmentation can be achieved although the predictability is not same for both. This literature review discusses the rationale, flap designs and predictability of GBR.