Guided tissue regeneration

Regeneration is a reproduction or reconstruction of a lost or injured part in such a way that the architecture and function of the lost or injured tissues are completely restored. Epithelium acts as a barrier to successful therapy because its presence interferes with the direct apposition of connective tissue and cementum, therefore would limit the height to which periodontal fibers can become inserted to cementum. Guided tissue regeneration (GTR) describes procedures attempting to regenerate lost periodontal structures through differential tissue responses and typically refers to regeneration of periodontal attachment. Barrier techniques are used for excluding connective tissue and gingiva from the root in the belief that they interfere with regeneration.