Guided Bone Regeneration
Guided bone regeneration or GBR, and guided tissue regeneration or GTR are dental surgical procedures that utilize barrier membranes to direct the growth of new bone and gingival tissue at sites having insufficient volumes or dimensions of bone or gingiva for proper function, esthetics or prosthetic restoration.
GBR is similar to guided tissue regeneration (GTR) but is focused on development of hard tissues in addition to the soft tissues of the periodontal attachment. At present, guided bone regeneration is predominantly applied in the oral cavity to support new hard tissue growth on an alveolar ridge to allow stable placement of dental implants.
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Picture shows a lower jaw with inadequate bone for implant placement.
Bleeding holes are placed in bone to promote bleeding (blood supply) to the graft material.
Particulate (granular) graft material is placed in the site.
A membrane is placed over the granules to keep them in place.