A new method for covering localized areas of root exposure with free connective tissue grafts uses connective tissue obtained from the depth of the hard palate, leaving only a narrow surface defect at the donor site. The graft is positioned directly over the exposed root, but its major part is placed in an "envelope" previously created by an undermining partial thickness incision in the tissues surrounding the defect. In this way, both sides of the graft are in intimate contact with these tissues which offer support and nourishment. Clinical results 2 to 8 months postoperatively are favorable.

The long-term stability of root coverage (i.e., the reduction of recession depth) and esthetic results perceived by patients were significantly better 10 years after CTG surgery, statistically, than after GTR surgery using bioabsorbable barriers.

Ten years after OFD and GTR in infrabony defects 35 of 41 teeth were still in place.

Placement of membranes during periodontal surgery for the enhancement of tissue regeneration in intrabony pockets is often both difficult and time consuming. In the light of our clinical results with resorbable membranes, such extra effort seems hardly warranted.