Guided Tissue Regeneration is a technique for directing cell growth towards specific areas of the periodontium damaged by periodontal disease, endodontic pathology or trauma. Periapical tissue regeneration will occur predictably after endodontic surgery if intra and extra - radicular infections are controlled by adequate root end resection and complete retrograde seal of the root canal.This dissertation explains about GTR techniques, its principles and materials used , healing after GTR, complication of GTR and their prevention.
