New attachment achieved by guided tissue regeneration in XXXX .

@entity235 @entity2543 @entity2521
This study tested the effects of using a Gore-Tex periodontal material on new connective tissue attachment in @entity235 with natural @entity2521 . Seven female @entity235 with advanced @entity2521 were selected and given thorough root debridement. Under general anesthesia four weeks later, mucoperiosteal flaps were raised involving all mandibular premolars and first molars. Gore-Tex periodontal material was adapted to all premolars, and the flaps were sutured tightly, keeping the material covered. The first molars acted as controls, receiving only surgery. Some material was removed in one month, while other materials were removed eight to 10 weeks after surgery. All @entity235 were sacrificed at three months. After processing, descriptive histology and histometrics were carried out, evaluating new connective tissue attachment, bone response and @entity2543 . Results were statistically analyzed, using paired t tests. They showed new connective tissue attachment with cementum deposition in areas where the material was used. Also, the @entity2543 was reduced in these areas. In the controls, minimal connective tissue attachment was found, with the area healing by a long junctional epithelium. Statistical analysis showed significant differences (P less than 0.05) favoring experimental areas both in the increase of new connective tissue attachment and in the decrease of @entity2543 . No differences were found between areas where the material was removed in one month or left longer in place. No difference in bone response was found. Gore-Tex material was effective in blocking gingival @entity2543 and connective tissue proliferation, promoting new attachment according to the principle of "guided tissue regeneration."
