An air pollutant is a substance in the air that can have adverse effects on humans and the ecosystem. The substance can be solid particles, liquid droplets, or gases. A pollutant can be of natural origin or man-made. Pollutants are classified as primary or secondary.
How is gum graft surgery performed? During gum grafting surgery, a periodontist will commonly take connective tissue from the roof of the mouth (palate) and suture it to the affected gumline. This allows more tissue to grow and close the exposed root surface (gum recession).
1 Connective-tissue grafts. 2  This is the most common method used to treat root exposure. 3  During the procedure, a flap of skin is cut at the roof of your mouth (palate) and tissue from under the flap, called subepithelial connective tissue, is removed and then stitched to the gum tissue surrounding the exposed root. In this procedure, instead of taking tissue from the palate, it is grafted from gum around or near the tooth needing repair. 2  The flap, called a pedicle, is only partially cut away so that one edge remains attached. 3  The gum is then pulled over or down to cover the exposed root and sewn into place.