In cases of periodontal disease, an osseous grafting procedure may be necessary to address the bony defects caused around a tooth by the progression of periodontal disease. An osseous grafting procedure, which involves guided tissue regeneration, rebuilds the bone and supporting tissues that have been lost. During the surgical procedure the roots of the involved teeth are thoroughly cleaned and the bony defects prepared and filled with a suitable bone graft material. The bone graft is then covered by a special membrane and then the gums are sutured back into place. With healing and time the osseous graft will fill in for the lost bone, thereby providing renewed support for the tooth.