Covering localized areas of root exposure employing the "envelope" technique.

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.